Chantelle's gloved hand gently felt around the lock and quickly found the battery box.
Feeling excited, she raised her hand and pulled a slim black hairpin from her hair.
She used the hairpin to scrape the bottom of the lock carefully.
After a soft click, the lock powered off.
She took out the battery, rubbed both ends and put it back again.
Just as she expected, the lock reset to its original settings.
The password turned out to be the simplest six digits: "000000."
Chantelle entered the password, and the door opened when the clicking sound rang.
She smiled proudly, pulled the door open, and walked inside.
But she didn't expect there would be a huge drop right behind the door.
She stepped into thin air and fell straight down.
Luckily, she reacted fast.
She grabbed her rope, hooked it onto the door handle, and managed to hang herself against the wall.
The whole space was dim.
