24 people have done terrible things to others, 10 male and 14 female. Their victims were family, strangers, it doesn't matter. Each offender committed something different, through physical or psychological abuse, believing nobody noticed or cared. But a shadow man witnessed every crime. He is an entity that cannot be seen with the naked eye, but he is always watching. There are 24 people and 24 hours in a day. He is here to claim the debt. Once he claims a life, a number appears near the body, counting down from 24. No one knows what the number means. With each life claimed, the shadow man grows stronger.