A violent gang kills two men during a robbery, and the Chief enlists the help of a regular informant in order to capture those responsible. The informant, Baxter, is a happy-go-lucky gambler with a wife and child, who has been keeping his duel identity a secret for years. This time, however, it looks as though his secret is going to become known to everybody.

When a woman crashes her car into the Chief's van after suffering a minor heart attack, doctors discover a bullet lodged in her chest, where it has apparently been for several years. When she claims to have no knowledge of ever being shot, the Chief investigates, and soon links her case to that of an unsolved murder.

A convict awaiting parole hears that his son has been shot dead following a clash with a rival teenage gang. Although eager for vengeance he has another son to think about, and the Chief is determined to keep them both on the straight and narrow, whilst at the same time finding out who really killed the boy.

After the killing of one of his men, gangland boss Lew Parker puts out a contract on Ironside, which the undercover Ed is forced to pick up. Unable to contact the rest of the team Ed has to go along with the preparations for a heist, but when his cover is blown and he winds up a prisoner, the Chief and co must find the missing links before it is too late.