Hannover. Dr. Mark Seifert, a psychiatrist and head of the social psychiatric service, finds himself caught in a whirlwind of mysterious and life-threatening incidents. A woman who confided her fears to Seifert is found murdered in her home. Initially, the police suspect a brutal robbery gone wrong, but the doctor remains skeptical. Several women in his circle suddenly face threats, including the psychotic Milena, who is forcibly admitted to a psychiatric facility. She bears a tattoo on her forearm from the satanic cult Nesankta Homaro. Its leader does not hesitate to use violence to assert his interests. Mark Seifert is shocked when another woman becomes a victim of a crime.