The group return to Floatia after recovering Rusty's artifact to plan for their next trip.
"So I guess my artifact is in the area called Infinite Cauldron." said Lincoln as he draws GrapLeomon in his journal while Rusty watches.
"How do we get there?" asked Clyde. Lincoln looks at the map in his journal once he finished drawing.
"Actually, it doesn't look too far off from Floatia." said Lincoln. "We won't have to go through Server Desert or Absolute Zero to get there."
"Thank goodness!" said Rusty.
"We'll start heading there tomorrow morning." said Lincoln.
"Yeah, I really need to warm up some more after being in that Absolute Zero place." said Stella.
"Okay, then." said Liam. After the group have dinner, they all go right to bed.
Next morning, the group have breakfast and start packing for their trip.
"What do you think Infinite Cauldron is like?" asked Zach.
"Hopefully it's not too hot or cold." said Lincoln.
"Yeah, but I'm expecting it to be hot since the area has 'cauldron' in its name." said Stella.
"If it does, then there's not much we can do about it." said Clyde.
"Well, let's get going." said Lincoln. As they exit Floatia, something was glowing in Lincoln's backpack.
"What's that?" asked Clyde. Lincoln looks inside and sees the light was coming from his journal.
"What's wrong with it?" asked Liam. Lincoln opens a page and a ball of white light comes out; it soon starts to change and turns into a famiiar face.
"Taomon!" said the kids.
"Children, if you are seeing this, then you have most of the artifacts." said the projection.
"Is this a recording Taomon left?" asked Lincoln with disappointment.
"To get to Infinite Cauldron, then you'll need a portal to enter it which I can provide you with." said Taomon's projection; it holds out its hand and a ball of blue light shoots out and creates a portal.
"This is way better than walking." said Rusty.
"I'm sorry you all had to be involved in the problems of our world." said the projection. "I believe you kids will be able to defeat Titamon. Stay safe." With that, the projection fades away, leaving the group alone with forlorn expressions.
"Well... let's do this." said Lincoln. As they step closer to the portal, Lincoln's Digivice starts glowing.
"Looks like your artifact is on the other side, Lincoln." said Clyde. Everyone looks at each other and nods, then enters the portal.
The group comes out in a strange area that goes straight down a spiraling stairway with a massive geyser of blue energy shooting out from below.
"Whoa!" said Lincoln.
"This place is so amazing." said Clyde. Lincoln looks down into the abyss and his Digivice starts glowing more brightly.
"Your artifact must be at the bottom of this thing." said Rusty.
"Let's start heading down there." said Lincoln.
"That's too many steps." Rusty groans.
"Just move, Rusty." said Stella. Suddenly, a dark portal opens above them and NeoDevimon flies out from it.
"Humans!" NeoDevimon shouts, getting the group's attention.
"Oh no, it's that guy again!" said Zach.
"You humans will not retrieve the last artifact!" said NeoDevimon.
"Who's gonna stop us?" asked Rusty.
"Don't ask him that!" said Stella. Clyde looks towards Lincoln.
"We'll keep him busy; you get your artifact!" said Clyde.
"I can't leave you all to fight this guy alone; he's an Ultimate!" said Lincoln.
"Lincoln, trust us; we'll be fine!" said Zach as he and the other kids use their artifacts to Digivolve their partners to their Champion Forms.
"Agumon, stay here and help the others." said Lincoln as he uses his Digivice to turn Agumon into GeoGreymon.
"Just get going, Lincoln!" said GeoGreymon. Lincoln nods and starts running down the path.
"Oh no you don't!" shouts NeoDevimon as he lunges at Lincoln.
"Horn Impulse!" shouts GeoGreymon as he charges at NeoDevimon and rams into him, knocking him back, much to his surprise.
"You've gotten stronger." said NeoDevimon.
"Our Digimon have been getting a lot of exercise." said Stella.
"Even so, it won't be enough to defeat me." said NeoDevimon before slashing GeoGreymon with his claws, knocking him back. Lincoln, seeing GeoGreymon hurt, wants to help him, but he knew he would want him to get his artifact, so he continued down the path.
Gaogamon charges at NeoDevimon; he tried to drive his claws into him, but he jumps up, dodging NeoDevimon's claws.
"Double Claw!" shouts Gaogamon, swinging his front claws at NeoDevimon; he blocks the claws with his forearms, but the force of Gaogamon's attack makes NeoDevimon stumble back; he kicks Gaogamon back, knocking him to the ground.
"Lion Claw!" shouts Reppamon as he swings his front paws at NeoDevimon; he blocks each strike, then swats Reppamon away, knocking him to the ground.
"Smashing Kick!" shouts Leomon as he delivers a heel kick at NeoDevimon; he blocks it with his arm, then slashes Leomon with his claws, knocking him to the ground.
"Sunshine Explosion!" shouts Sunflowmon as she releases seeds from her petals at NeoDevimon; he crosses his arms and blocks the seeds as they explode on contact; when the smoke from the explosions cleared, NeoDevimon was still there.
"Powerful Punch!" shouts Golemon as he throws a punch at NeoDevimon, but he catches Golemon's fist with his hand, then claws Golemon across his chest.
Deeper in Infinite Cauldron, Lincoln continued running down the path as quick as he can.
"Man, I have to be close to the bottom of this thing by now." said Lincoln as he keeps going deeper into Infinite Cauldron. "I hope the others can hang on."
Back at the battle, the kids' Digimon were struggling against their opponent.
"Guilty Claw!" shouts NeoDevimon as he jabs all the Digmon with his claws, knocking them to the ground; they struggle to get up. Clyde looks at his artifact.
"I wish we knew how these things work." said Clyde, worriedly.
"Yeah; we'd be able to take that varmint down." said Liam.
"I wish these things came with an instruction manual." said Rusty, looking at his artifact.
"We need to hang in there until Lincoln gets his artifact." said Leomon.
"Hang tough!" said Gaogamon.
"Like that's gonna do anything to help." said NeoDevimon as he flies at them with his claws pointed forward.
Meanwhile, Lincoln reaches the bottom of the pit and looks at the spot where the energy geyser was originating from and sees a familiar glowing orb.
"My artifact!" said Lincoln. He takes a couple steps forward and the orb vanishes, revealing the object he was looking for; it floats towards Lincoln and wraps itself around his wrist, then his Digivice gets absorbed into it.
"Now to get back to the others." said Lincoln as he starts the climb back up to where his friends' Digimon were struggling to beat their opponent.
"He's too much." said Reppamon as he was lying on the ground, exhausted, along with the other kids' Digimon. NeoDevimon floats above the group with a scowl on his face.
"I should've destroyed you back at Logic Volcano when I had the chance!" said NeoDevimon.
"Why didn't you?" asked Clyde.
"I never expected you all to become a threat to us!" said NeoDevimon. "Now to make sure you never cause trouble for Lord Titamon!" He then flies down at the group with the intent to finish them.
"Mega Flame!" shouts GeoGreymon as he opens his mouth and uses the last of his remaining strength to releases a powerful stream of flame at their opponent, forcing him to block the attack with his claws.
"Impressive." said NeoDevimon. "I didn't think you had enough strength to do that."
"You never know what you're capable of when you really put effort into it." said GeoGreymon as he drops to one knee.
"Well, let's see if your capable of enduring a painful destruction!" said NeoDevimon as he raises his claws to deliver a finishing blow.
"No you don't!" shouts Lincoln, making everyone look to see him running in between NeoDevimon and GeoGreymon.
"Lincoln!" shouts Lincoln's friends.
"Am I late for the party?" asked Lincoln.
"No, you're in time... for your 'going away party'." said NeoDevimon.
"Good, because I brought a little something extra." said Lincoln as he holds out his wrist, revealing his artifact.
"He got it!" said Zach.
"Too bad you won't survive long enough to use it!" said NeoDevimon. GeoGreymon runs in front of Lincoln and prepares to protect him.
"You want him?" asked GeoGreymon. "Then you'll have to go through me!"
"I can do that." said NeoDevimon as he thrusts his claw forward.
"No you don't!" shouts Lincoln as his artifact starts to glow brightly, making energy radiate from GeoGreymon that blocks NeoDevimon's attack.
"What?!" shouts NeoDevimon.
"Let's take this to the next level!" said Lincoln as a button on his artifact starts to glow brightly.