Ginger Martin hires Tom to find her husband Johnny, who has been missing for two years. Tom locates Johnny, captaining a yacht for and having a forced affair with wealthy Verna Collins. When Verna is murdered, Johnny is accused and sent to jail. Tom works to uncover the real murderer.

Actor Mark Hamiton arrives in Hawaii and Tracy Steele draws an unusual assignment, to keep Hamilton's three ex-wives away from him. They plan to kidnap him in order to get back alimony payments. Hamilton also gets involved in a murder when he kills his business manager, who was aware that the actor had evaded paying his income tax.

A crop of 20-dollar bills turns up in Honolulu, and the Treasury Department asks MacKenzie to help find the source. At first glance, the bills appear to be the work of former counterfeiter Capt. Joe, who they thought had gone straight. It turns out he has been kidnapped by the real counterfeiters, but is refusing to cooperate with them in making new $50 plates.