Kevin Dobson plays a widower with a young son who moves from New York to San Francisco after his wife's death. There he becomes a detective on the San Francisco police force, and his first case sends him back to the Big Apple. He has to defend himself against a charge that he, as a New York cop, strong-armed a witness.

Shannon learns that his father-in-law is the victim of loan sharks.

Ivy Horton tries to kill her ex-husband and mental patient, Alex, to protect herself and her daughter. The man threatens his family but can't be arrested until he commits a crime.

Shannon is assigned to work with Judy, a policewoman, who resents his help.

Shannon is on tho take, folks, but it is only to break a gambling operation. It started with the suicide of a police officer suspected of having received bribes. Shannon seizes this opportunity to cultivate friends among the wheeler-dealers in town. One particular person is Burt Harvey, who is happy to make an "investment" In return for information. With the help of Connie, the girlfriend of the dead officer, Shannon and Moraga set out to wipe out the entire Illegal actions.

The investigation of a black politician's murder is complicated by the involvement of the syndicate.

Shannon's investigation of a slick bank robbery team is hampered by, detective White's, Shannon's partner, personal problems.

A charred body Is found In the debris of a building obviously torched by an arsonist and Shannon uncovers a trail that leads to a local hood who used to know Shannon when they were boys.