A series of young nurses are being murdered and a witness places another nurse at the scene. Hooker discovers some similarities to a previous case he had worked 6 years before, but the killer was never apprehended. It is soon discovered that the suspect may not be a woman at all, but a man dressing as a woman - specifically, a nurse. 

In pursuit of a trio of diamond thieves who escape via helicopter, Hooker is devastated when he accidentally shoots a 9 year old boy, leaving the youngster critical in hospital. Meanwhile, Corrigan is concerned when his steady girlfriend Jill starts acting strangely before abruptly breaking off their relationship. The girl is actually being blackmailed by the trio of robbers; and when her body is found washed up from the ocean, Stacy goes undercover at the aerobics gym where Jill worked to try and get a lead, endangering herself in doing so.