An elusive and dangerous serial killer is terrorizing New York. The murderer's method of operation is baffling and grotesque. There seems to be a specific purpose for the killings, but no one can quite grasp it. When two police detectives arrive at the first crime scene, their dislike of each other is evident, and they immediately collide. Fiona Sapiro, head of the newly conceived New York Special Force unit, urgently seeks to become involved with the investigation and help end to the deadly assaults. Sophie Andrews, a detective from the nearby precinct where the murders occurred, rejects all offers of Fiona's participation. Both women desire an end to the bloodshed and the capture of the killer, but first, they will need to put their differences aside to solve the crimes. Over time, the killer becomes progressively more arrogant, and the carnage at the crime scenes intensifies. As Fiona and Sophie are forced to accept collaboration, their relationship deepens. Will they finally acknowledge they are a perfect fit, or will they run away from feelings that both deem perilous? One thing is certain ... the killing must stop!