Tom and Tracy are hired to find out who killed a skin diver. Tracy discovers that Lady Blanche Carleton, a young widow, is involved in the murder, and that a string of valuable black pearls was the motive--but there are questions as to whether the pearls are real or fake.
A former Japanese officer escapes from a mental hospital, and Tom and Tracy are hired to find him. However, the escapee has amnesia and doesn't remember that the war is over, and his combat skills will make him difficult to catch and his dedication to his "cause" could mean disaster for Honolulu.
The beautiful Marian Summers registers for a stay at the Hawaiian Village Hotel, attracting Tom's attention. What also attracts his attention is a series of burglaries at the hotel that just happened to begin soon after Marian checked in. It turns out that she is the girlfriend of a mainland gangster facing trial, and has been packed off to Hawaii so she won't testify--and her boyfriend's associates have sent a hitman along to make sure that she never does.
An actress shooting a movie in Honolulu accidentally runs over and kills a man with her car. Panicking, she flees the scene. However, the film's assistant director witnessed the accident, and uses that fact to blackmail her.
Tom and Tracy are hired by a real-estate agent to find a missing man. What they don't know is that the man they're looking for is an ex-convict that the agent needs to complete a land swindle he's involved in.
A young man who was raised by a local beach boy sees a woman and has a faint memory of her. Tracy and Tom investigate and find out the woman's son was lost at sea many years ago and that this young man might be her son. Her current husband has designs on her money and blocks the reunion with the help of his mistress.
Los Angeles private eye Stu Bailey tracks an embezzler to Hawaii, and asks Tom and Tracy for help. Their investigation leads to a travel agency that's a front for a swindle/murder racket involving beautiful local girls and wealthy visitors to the islands.
A wealthy businessman who had asked Tracy to protect him is found murdered. Tracy's friend, a reporter, had been investigating the businessman and had a notebook full of information about him, but it was stolen not long before the murder, and contained damaging information about some very powerful people.
Tracy is hired by a Los Angeles law firm to find a missing woman named Nancy Campbell. His investigation leads him to believe that Nancy is being stalked by Harry Gulliver, a man who served with Tracy in the Air Force during the Korean War and whose cowardice almost got Tracy killed.