Zombie Prison

Six students who were once juvenile offenders participate in "Sinful Humans," a reality observational variety showwhere they live alongside actual inmates and carry out missions inside an abandoned prison in order to shed the stigma of being juvenile delinquents. Hiding their true motives for joining, they grit their teeth and endure the program, though dissatisfaction grows toward PD Jung, who treats them roughly and pushes them like real prisoners, contrary to what was announced beforehand. Then one day, an unknown virus spreads inside the prison, turning the inmates into zombies. To make matters worse, the prison is sealed off to prevent the virus from leaking outside. Will they be able to fight their way past the zombies and inmates, escape the prison alive, and achieve the goals they each set out to accomplish through the program?