This is the fourth schoolgirl to become a victim of a ruthless killer... The girls are found naked, with a shaved head, on which a strange sign is tattooed. Agent Stephen Thatcher begins an investigation. He must understand what motivates the criminal before there are more deaths! But the killer leaves no traces or evidence. Meanwhile, Stephen's girlfriend falls into a deadly trap. She has only one chance of salvation! Who will emerge victorious in a dangerous game where life is at stake?