An urgent call brings FBI agent Kate Hayden back to San Antonio, the scene of her violent past. A brutal new murder shows hallmarks of a serial killer nicknamed the Samaritan. Tricky part is, Kate already caught him. Did she make an error, or is it a copycat? Paired with homicide detective Theo Mazur, Kate faces an enemy who knows her intimately. When a second body is found, the mode of death is identical to a different case that Kate had worked on....

She's hunting. He's watching. Special Agent Macy Crow is a survivor. After a vicious hit-and-run nearly kills her, she gets right back to work, and now she's gunning for a spot on the FBI's elite profiling team. As an audition, she offers to investigate the recently discovered bones of Tobi Turner, a high school girl who disappeared fifteen years ago. While investigating with local sheriff Mike Nevada, a former colleague and onetime lover, Macy discovers...