SYNOPSIS

Trapped in a cursed training center, a class of students from Yooil High School is suddenly forced to play a deadly mafia game, with no means to end the game. With excellent inferential skills, Yoon-seo tries her best to find means to escape. Jun-hee is the class president. He is responsible and has a strong sense of justice, but his resolve starts to waver as his classmates begin to die one by one.