 He wakes up in an unfamiliar room. He does not remember who he is or how he got here, and he doesn t know the people standing around him. They show him horrifying pictures of dead women, mutilated bodies and appalling wounds. Then they tell him that he killed all those women. They say his is a serial killer who has been treated and must now pay his debt to society. His task is to hunt down other serial killers endowed with inhuman strength and cruelty. Soon he begins to be hounded by doubts: has he really been told the truth about his past?