Halloween is approaching, and criminal psychologist Audrey Harte has been hired by the prosecution to help prepare for the trial of 19-year-old serial killer Ian "Boy Scout" Monroe. His one surviving victim, Tori Scott, is the star witness, but when someone begins killing with Monroe's M.O., the authorities--and Audrey--begin to wonder if Monroe had a partner. Keeping Tori safe is the main concern, but Audrey has also attracted the copy-cat's attention. Audrey is drawn into a dangerous game of cat-and-mouse, and when someone close to her is abducted by the killer, Audrey has no choice but to play.