The girl is sixteen, at the scene of a grisly triple homicide, and has a gun to her head. She claims “The Stranger” killed her adoptive family, that he’s been following her all her life, killing everyone she ever loved, and that no one believes her. No one has. Until now. Special Agent Smoky Barrett is head of the violent crimes unit in Los Angeles, the part of the FBI reserved for tracking down the worst of the worst. Her team has been handpicked from among the nation’s elite law enforcement specialists and they are as obsessed and relentless as the psychos they hunt; they’ll have to be to deal with this case.