Someone is eliminating child molesters in Los Angeles. The killer inhabits the streets of LA like a phantom. A decorated war veteran suffering from post-traumatic stress and substance abuse, he has disconnected from friends and family. A reject of society, he is secretly devoting his life to a deadly mission he sees as noble. The mass media have turned 'The Executioner' into an urban legend. Detective Sergeant Mark McQuade is hunting the killer but has a lot on his mind. His wife has just left him; his captain is pressuring him; and, while investigating the murders, he gets involved with Donna Wright, a single mother. Besides, fewer child molesters are prowling the streets, so people are not enthusiastic about the killer being captured. Nevertheless, McQuade has a duty but a lack of clues. When a man abducts another boy, this one especially close to the detective, the killer chases the kidnapper and McQuade desperately pursues both in a thrilling struggle for life and death.