Weeks before NYPD detective Michael Bennett is to marry his longtime love, Mary Catherine, an assassin announces his presence in the city with a string of grisly murders. Each victim is a young woman. And each has been killed in a manner as precise as it was gruesome. Tasked with working alongside the FBI, Bennett and his gung-ho new partner uncover multiple cold-case homicides across the county that fit the same distinctive pattern, proving the perpetrator they seek is as experienced at evading detection as he is at ending lives.