Lured to a prison with a promise of information, the Chief and Mark are taken hostage by three convicts desperate to escape. Together they plot to undermine the escape attempt by turning the situation to their own advantage.

Outside odds horses are starting to win at the local track, and Ironside is soon on the case. He discovers that somebody is trying to fix the races, but his prime suspect is Eve's one-time fiancé, and a jockey who may be the unwitting key to it all.

Chief Ironside's sponsored "daughter" arrives from Korea, intending to marry a fellow Korean now living in San Francisco. Before he can be fully happy about the marriage, however, the Chief wants to know a little more about her fiancè; and soon finds out that the young man is in trouble.

A man with an uncanny ability to tame vicious guard dogs commits a series of robberies in San Francisco. The Chief has a plan to stop him, but it calls for a dog of his own and a willingness to put himself right in the line of fire.