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 Monroes 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-cats 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--