As Michael Bennett's wedding day approaches, a killer has a vow of his own to fulfil in the thirteenth thriller featuring the NYPD's finest detectiveWeeks before NYPD Detective Michael Bennett is to marry his long-time love, Mary Catherine, an assassin announces their presence in the city with a string of murders. All of the victims are young women, and each has been killed in a manner as precise as it was gruesome. Tasked with working alongside the FBI, Bennett uncovers multiple cold-case homicides across the country that fit the same distinctive pattern.