Description

Kim Sang-an is a ruthless loan shark whose world shatters when his sister, a schoolteacher, takes her own life after relentless bullying from her students. Unable to accept her death, he enrolls as their new homeroom teacher with a singular purpose: to collect the debt these students owe for destroying her. What unfolds is a dark clash between a man willing to descend into any darkness for revenge and a classroom of students who show no remorse for what they've done.