On the windscreen of his SUV, Billy finds the first note. It gives him a choice. If he takes the note to the police, an elderly woman will be killed. If he doesn''t approach the police, a schoolteacher will die. He thinks it''s a hoax. The schoolteacher is killed. Further notes taunt Billy''s conscience, forcing him to decide who lives and who dies. He must think the unthinkable, fast, in an accelerating nightmare. More communications from the killer follow with ever tighter deadlines. ..