Daisy's sister, Lisa, was visiting Daisy's hometown and spotted The Justice Brigade fighting a monster. Once they finished fighting the monster, they went home, took off their masks and costumes, and walked into their house. Once they got there, they saw Lisa waiting for them. Lisa asked, "And just where have you been?" Daisy glanced angrily at Lisa. Daisy said, "Lisa? If you need me, I'll be in my room." Daisy left, pushed Lisa to the sofa, and locked herself in her bedroom. Lisa introduced, "Sorry about that. I'm Lisa, Daisy's older sister." Jake asked, "Any idea why she's so mad at you, even though you've only been here a few minutes?" Lisa responded, "Growing up, she considered me a pest and never listened to me, not even when I was just trying to help her." Jake recommended, "Maybe I'd better go talk to her." Hannah said, "I'll prepare dinner." Lisa asked, "Hey, do you have a TV? I want to watch some."
Frank pointed to the living room and said, "Right over there." Lisa walked over to the TV and then turned it on. Then her face flushed red, and she looked at herself in her compact, and she looked younger. "Marvelous," Lisa remarked. Lisa closed her mirror and announced to herself, "People's anger is the nectar that keeps me looking fabulous. And with me around, Daisy couldn't be angrier and more miserable. She's like a walking spa treatment." Then Lisa heard Daisy scream and break something in her room. Lisa smiled wickedly and used the TV remote to find a show she liked.
While Lisa was watching TV, Jake knocked on Daisy's door. Daisy ordered, "Go away." Jake opened the door and assured, "I come in peace." Daisy then shot a Sun Beam from the palm of her hand and wrecked part of the wall by Jake. "Aggressive much," Jake remarked. Daisy lay down on her bed and ordered, "Leave me alone. I have already deactivated all the superhero alarms so that Lisa won't suspect anything. Oh yeah, and I will stay locked in my room as long as she's here." Jake walked in and closed the door. Jake asked, "What if an emergency comes along?" Daisy replied, "I'll be there."
Lisa then walked by Daisy's door and heard Daisy and Jake talking. Daisy remarked, "But if Lisa's here, I'll never leave my room. She's an annoying sister who doesn't know how to mind her own business and has no respect for her sister's privacy. So, if she were here, I would say to her face, 'MIND YOUR OWN BUSINESS!' So, consider her the new Daisy while she's here." Daisy then opened her door and kicked Jake out of her room. Then she slammed the door shut and locked it. Jake banged on Daisy's door, shouting, "You do not get to kick me out. Open up the door, open up." Daisy heard Jake but ignored him and then put on her headphones so she wouldn't have to listen to him. Lisa heard Daisy and Jake arguing, making her younger and more muscular.
Jake then looked up and saw Lisa. Jake asked, "How much of that did you hear?" Lisa responded, "Enough. Maybe I should talk to her." Jake mentioned, "A few problems. 1. She locked the door, and 2. You're the last person she'll listen to." Lisa responded, "We'll see about that. And I can pick the lock on the door." Lisa used her credit card to pick the lock on Daisy's door and opened it. Lisa remarked, "If there's one thing I know how to do, it's use a credit card." Lisa walked into Daisy's room and shut the door. Lisa greeted, "Hi, Daisy. Can I talk to you?" Daisy replied, "Sure. Let's start with this. PILLOW FIGHT!" Daisy threw her pillow at Lisa, hitting her. Jake put his ear to the door and listened to what was happening in the room. Then Daisy whacked Lisa with a stick she had stored away in case a bad guy entered her room. Then Daisy opened the door and beat Lisa out of her room. Then she slammed the door shut, locked it, and barricaded it. Lisa remarked, "Yep, she hates me." Jake added, "And that only took 2 minutes." While lying on her bed, Daisy covered herself with her sheets and didn't come out for hours. Hannah shouted, "Dinner time!" Lisa, Hannah, Jake, and Frank showed up for dinner, but Daisy refused to come down. Hannah recommended, "Maybe I can get her to eat something." Hannah walked upstairs with a plate of food for Daisy. Jake gasped, "Huh. 3, 2, 1." Then they heard a bunch of beating noises and the sound of a door slamming. Once Hannah returned downstairs, the others saw that she had a black eye, messed-up hair, and a scraped knee. Hannah remarked, "She accepted my peace offering and beat the crud out of me."
While the others were eating, Daisy ate in her room, looked out her bedroom window, and opened it. Daisy then put on her superhero uniform and mask, snuck out her window, and went to their garage, where she got on her Suncycle and drove it around town. While Sungirl was driving around town, everyone in town saw her and waved hello to her. Meanwhile, her team and sister were at the dinner table, staying quiet and barely touching their food because they were too busy thinking of Daisy, who was too angry to come out of her room. Then Hannah opened her mouth and looked at it. Once she did, she saw her Heat Sense emerging from her mouth. Hannah looked around but saw nothing out of the ordinary, so she continued eating.
Meanwhile, Sungirl was driving around town on her Suncycle. While she was riding, she didn't stop any trouble, so she headed home. Once she got there, she parked her bike in the garage, locked the door so Lisa wouldn't see their super vehicles, and flew back inside her bedroom window. Once she arrived, she removed her mask and uniform, then put on her regular clothes. Then she climbed into bed, covered herself with the sheets, and fell asleep, still seething with anger at her sister.
Daisy stayed in bed the next day because she was too angry to come out. Jake then went to breakfast and saw Hannah using her Heatgirl powers to make it. Jake asked, "Hannah, why are you cooking? That's Daisy's job." Hannah said, "All is quiet with Daisy." Jake questioned, "She made up with Lisa?" Hannah replied, "Nope. All is quiet because she's not speaking to her, and she won't leave her room." Jake knocked on Daisy's door upstairs, but no one answered. Jake then opened her door and saw Daisy under her sheets. Jake asked, "Daisy, are you OK?" Daisy blasted Jake away with one of her Sun Beams from her finger, and he got hit against the wall. Then Jake's eyes glowed blue, and he put on an angry scowl. Jake flew up to Daisy, grabbed her, and smashed her through the wall.
Jake remarked, "You want to fight; you got it." Jake made his eyes and body glow blue and changed his clothes into his superhero uniform. Then Daisy made her eyes and body glow yellow and changed her clothes into her superhero uniform. Iceboy then shot an Ice Beam at Sungirl, but Sungirl put up her Sun Shield and blocked his attack. Iceboy's eyes glowed blue, and he warned, "Don't make me hurt you." Sungirl made her eyes glow yellow and replied, "Don't make me laugh." Sungirl shot Sun Beams from her eyes, and Iceboy shot Ice Beams from his eyes.
Lisa and Hannah then opened Daisy's door and saw she wasn't there, but they saw a big hole in her wall. Lisa wondered, "What happened?" Hannah responded, "I think I have an idea." Iceboy got slammed through the floor, fell onto the kitchen table, and destroyed it. Then, Sungirl jumped through the hole in the floor they made and landed on Iceboy. Iceboy demanded, "OK, spill. Why are you so mad at your sister?" Sungirl grabbed Iceboy, spun him around in circles, and threw him into the living room, where he hid from Sungirl. Sungirl responded, "Because she was a pest growing up. She had no regard for my privacy." Sungirl destroyed the sofa with her powers and found where Iceboy was hiding. Lisa and Hannah heard a bunch of pounding from downstairs, and Hannah's Heat Sense went off again. Lisa and Hannah ran downstairs and saw Sungirl and Iceboy fighting. Hannah put her index fingers in her mouth and whistled loudly to stop them from fighting.
Once they stopped, they both flew out the door. Lisa wondered what they were doing in the house in the first place, but Hannah knew. Sungirl and Iceboy flew in their bedroom windows, took off their costumes, and put on their regular clothes. Daisy said, "Well, I'm never leaving my room." Then Jake left his room and went downstairs to watch TV. Once he got down there, part of the ceiling fell from all his fighting with Daisy. Jake looked around and saw that the coast was clear. Since it was, Jake used his Iceboy powers to fly all over the house, fixing and rebuilding everything.
Once he finished, he saw Lisa's reflection in the window and saw her sneaking downstairs to the basement. He wondered what she was up to, so he put on his superhero costume and mask and spied on her. Iceboy hid behind the sofa, peered around it, and saw red energy floating above Lisa. Then it entered her body, causing her to glow red and appear younger. Lisa announced, "Man, that's good." Lisa opened her compact and saw how young she was. Lisa added, "People's anger and frustration is the nectar that keeps me looking fabulous, and with other people's anger and frustration, there'll be enough anger in this town to keep me looking young forever." Lisa then turned her body into a red beam of light, flying directly through the ceiling while laughing wickedly.
After hearing Lisa's speech, Iceboy flew upstairs and knocked on Hannah's door. Hannah opened her door and saw Iceboy in costume. Hannah asked, "Iceboy? Why are you suited?" Iceboy answered, "It's Lisa. She's evil." Hannah said, "I know she drives Daisy nuts, but that doesn't give you the right to call her evil." Iceboy replied, "Maybe not. But I followed her into the basement and saw her using her powers and giving herself an evil speech. Remember when your heat sense went off at dinner yesterday, right after Daisy kicked you out of her room?" Hannah answered, "Yes." Iceboy said, "Well, anger is like heat. You get fired up and then scream. Once you came downstairs, your heat sense went off, probably because Lisa was absorbing Daisy's anger." Lisa then showed up, and Hannah grabbed Iceboy and brought him into her room so Lisa wouldn't see him in costume. Iceboy whispered, "Watch this." Lisa walked into Daisy's room, and Daisy beat her up and threw her out. Lisa looked around, thought the coast was clear, and didn't see Heatgirl and Iceboy spying on her. Lisa then took out her compact, and Heatgirl and Iceboy saw her face glowing red, as Daisy's anger healed her. Then Heatgirl's heat sense came out of her mouth, and Heatgirl figured Iceboy was right; she had been sensing Lisa's powers.
Since they were sure Lisa was evil, they had to warn Daisy and Frank. Iceboy opened his communicator, and both Daisy and Frank answered. Daisy and Frank saw that Iceboy was suited, and he was with Heatgirl. Daisy asked, "What do you two want?" Iceboy said, "It's your sister. She's evil." Daisy responded, "Tell me about it." Iceboy replied, "No, she's evil for real. She's absorbing anger, especially yours, and becoming immortal. That's how she feels so quickly after you kick her out of your room, and why Hannah's heat sense has been going off. She's been sensing Lisa's powers." Frank replied, "That would make sense." Daisy questioned, "If my sister did have superpowers, don't you think she would have caused some chaos by now?" Iceboy replied, "She already has. She's been absorbing the town's anger, especially yours, and growing more powerful. We have got to stop her." Daisy responded, "OK, we'll try." Iceboy ordered, "Meet us downstairs in uniform in twenty minutes."
Lisa walked towards the living room and muttered, "I can't wait until I've destroyed everything." Then she got blasted to the ground with a Sun Beam. Then she looked ahead and saw the Justice Brigade standing before her. Iceboy remarked, "You made a big mistake stepping into this house." Lisa responded, "Really? Well, Daisy and friends..." Lisa made her eyes glow red. Lisa asked, "Do you see this coming?" Lisa transformed herself from a human to a shadow spirit with glowing red eyes like Heatgirl's. Then she smiled evilly and used her powers to blast Iceboy away. Lisa confessed, "You may have discovered my secret, but I found yours. How else can The Justice Brigade live in the same house as my sister and her friends?" Sungirl remarked, "We're still going to stop you." Lisa reached out both her arms and gave an evil smirk while she started to glow red. Lisa then got younger and more powerful. Lisa said, "That's it. Express your anger. See how good it feels. And the angrier you are, the stronger I become." Heatgirl flew up into the sky and then down towards Lisa.
Lisa looked up and saw Heatgirl coming, and then Heatgirl grabbed Lisa and smashed her through the floor into the basement. Lisa got up, and so did Heatgirl. Then, Heatgirl used her powers to move the basement sofa towards Lisa and smash her into the wall. The rest of the Justice Brigade flew through the hole they made and saw them fighting. Lisa used her powers to push the sofa out of the way and then used it to hit Heatgirl away. Lisa then flew up to Sungirl, grabbed her, and flew her across the room and up the stairs. Lisa kept holding onto her while she took Sungirl wherever she wanted to go. Sungirl shouted, "Let go of me!" Lisa responded, "Why would I do that? Your anger, your frustration, it's delicious."
Lisa flew Sungirl to the window, and they looked out. Lisa said, "And the best part is. As soon as I'm done with you four and keep you angry at me and each other forever, there'll be enough people out there for me to have immortality. And once I do, you'll never come to their rescue because you'll be too mad at them, and no one will ever know whose fault it was, because they're all too mad at each other." Sungirl said, "Man, I am so tired of you making me miserable. And I'm so tired of making others miserable, too." Sungirl began to glow yellow as she spoke. Sungirl added, "My friends never gave up, even when I was mad at them." Sungirl made her eyes glow yellow and added, "And I won't let them down."
Sungirl broke free of Lisa and glared at her, which gave her even more power. Lisa glowed red and said, "Thank you. Now, sister dear, it is time for you to suffer." Lisa flew up to Sungirl, but Sungirl flew around her and remarked, "Or maybe it's time to get tougher." Sungirl grabbed Lisa's tail and threw her out the window. Sungirl flew into the basement and told her team her sister was gone. Then Sungirl's sister grabbed her and slammed her against the wall. Heatgirl remarked, "I thought you said she was gone." Sungirl responded, "Guess I was wrong." Lisa remarked, "Look at you. Look at all of you."
Sungirl made her finger glow yellow, but Lisa smacked her hand, making her stop. Lisa asked, "What are you? Are you freaks trying to fit in with humans? Or creepy humans with creepy powers?" Heatgirl looked up and got an idea. Sungirl responded, "Both. No, neither. I don't know." Lisa added, "You're a bunch of freaks. You're not a normal girl, and you never will be." Lisa covered Sungirl with her red anger energy, dropped her, and she fell to the ground. Lisa asked, 'Who cares for something like you?" Heatgirl replied, "We do." Heatgirl pointed up, blasted the ceiling with her powers, and collapsed it onto Lisa. Heatgirl wondered, "I'm not sure if this will work, but it's worth a try." Heatgirl made her eyes and hands glow red, lifted Lisa out of the pile, and tried her hardest to drain her of her powers. Heatgirl, feeling accomplished, "I think it's working." Once Heatgirl began draining Lisa of her powers, Lisa grew weaker and older. Then, she aged from age 14 to age 24 and became powerless. Heatgirl asked, 'Boys, will you do the honors?" Iceboy responded, "With pleasure. Sweet dreams." Iceboy shot Lisa with one of his Ice Beams and froze her, and Aquaboy flew her out of the house and took her into custody. Sungirl asked, "Hey, Heatgirl, when can you do that?" Heatgirl replied, "Since just now. I have a new power."
After they got rid of Lisa, the Justice Brigade took off their costumes and had dinner. While they were eating, Daisy set her fork down and felt a sense of dread. Daisy apologized, "Guys, I'm sorry for everything I said and did." Hannah responded, "It was your sister wanting more power. We forgive you." Jake added, "Yeah, we forgive you." Frank added, "What are friends for?" Then all four of them became friends again and continued eating their dinner. Then, their alarm sounded. They smiled and then flew downtown in costume to stop a few jewel thieves, which they did.
The End