A high school teacher reaches the end of his patience and turns into a lethal murderer. As a former army man, he draws on all his experience as a trained killer, and only the kids in detention are left to stop his bloody murder spree.
Overview：A high school teacher reaches the end of his patience and turns into a lethal murderer. As a former army man, he draws on all his experience as a trained killer, and only the kids in detention are left to stop his bloody murder spree.
