In the year 2050, a new penal system has been implemented due to the rise of violence and crimes. The Tower of Sins is a monumental prison complex with seven heavily fortified floors. Each floor, themed after one of the seven deadly sins, presents grueling psychological, physical, and moral challenges tailored to the sins it represents. The prisoners must climb the tower to the top floor to have a parole and achieve freedom. Kyle de Guzman, a young man who took justice into his own hands after the brutal assault of his only sister, is convicted of murder and sentenced to the Tower of Sins. Adding to his torment, Kyle must climb the tower - to stay alive and see his sister again.