A traveling hit-woman seduces Inspector Keller, gaining valuable intelligence for her San Francisco assignments. A mob hired her to help win a gang war, which Keller is investigating. Keller's superior Lt. Mike Stone hears wedding bells, but death knells are more likely as she's living in a bay-side apartment next to the younger, love-struck Keller.

John Davidson's best acting performance (in the eyes of nearly everyone associated with the show) comes when he plays a nightclub entertainer who dresses up as a famous female torch singer. Unfortunately he is schizophrenic, and becomes her and him -- at the same time. Even worse, "she" is a psychotic killer. Watch for a chilling scene where "he" talks to "her" in a mirror.