女探员凯蒂在调查连环谋杀案时,对嫌疑犯产生好感;同时,所有证据直指凯蒂的同僚Detective Kate McBain investigates the strangulation murders of several young women after sex and connects up with a suspect through an escort service. She and the suspect get sexually involved, but things take several twists and turns before the final revelation.