A school is placed under lockdown. Teachers randomly leave their classrooms, locking their students inside and disappearing. An announcement echoed throughout the buildings, causing the chatter and cries to be replaced with an eerie silence.

"All students are not to leave the school grounds. Each class has been assigned a killer. Who's identity will be kept hidden. Their mission is to kill all of their classmates to win. The only way for you to win is if you can kill the killer before the killer kills you. Happy hunting.. Killer." 

Inspired by 'Running Man' Episode 151: It's A Killer