While on vacation in Hawaii, Mavis Purcell is nearly killed in two suspicious accidents and suspects her artist husband is behind them, so she asks Tracy Steele to protect her.
When Tracy and Tom are hired to find the killer of a skin diver, Tracy finds out that a young widow named Lady Blanche Carleton is involved and that a string of black pearls worth a fortune are the reason behind the murder, but the question is whether or not the pearls are real.
Former Japanese military officer Yato Mitsuki escapes from a mental hospital in Hawaii, and Steele and Lopaka are hired to find him, but time is running out - Mitsuki has amnesia so he does not remember that World War II is over and he may cause a second Pearl Harbor disaster.
When a lovely guest named Marian Summers checks in at the Hawaiian Village Hotel, she attracts the attention of Tom Lopaka, and coincidentally a string of burglaries plague the hotel. Marian is the girlfriend of a gangster facing a grand jury in Chicago and has been sent to Hawaii to keep her from testifying. The gangsters have also sent a hit man to make sure she never speaks again.
A movie star accidentally kills a man in a hit-and-run and flees the scene of the crime, but not before the assistant director of the movie company spots sees her doing so, resulting in a blackmailing scheme that Tracy eventually exposes.
Private eyes Steele and Lopaka are hired by a slick real estate operator to locate a missing man, a released felon whom he needs to complete the deal in a land swindle.
Peter, a beach boy, claims to be the son of wealthy Donna Lane and is arrested when he trespasses on her property. Donna claims her son died in a drowning accident nine years earlier while swimming with his stepfather Carleton. Steele decides to help the boy and prove he is Donna's son and also find out what really happened nine years ago.
From the mainland, investigator Stu Bailey calls on Steele and Lopaka to track down an embezzler who's gone to Hawaii. The trail leads them to a travel bureau which turns out to be a front for illicit activities in which pretty native girls are used in a scheme to defraud and kill wealthy vacationers.
Wealthy businessman Victor Shaw, who asked Tracy Steele for protection, is found murdered. Tracy's reporter friend, Jerry Jackson, had a notebook full of damaging information about Shaw, but the notebook was stolen shortly before the murder, causing concern for all involved.
Following the trail of missing money puts Tom in the path of four killers.
Tracy is hired by a ranch owner to investigate the loss of several shipments of cattle.
Tracy attempts to clear an army lieutenant who won't try to defend himself against robbery charges.
A law firm in Los Angeles hires Tracy to locate Nancy Campbell, who is missing. Tracy qestions her friends, only to figure out that they are covering up for her. Nancy is being threatened by Harry Gulliver, a man with whom Tracy during the Korean War. Gulliver was the machine gunner on Tracy's plane and had been unable to pull the trigger when they were attacked by enemy planes. Now Gulliver plans to kill Nancy, but once again he cannot pull the trigger when Tracy recounts the Korean incident.
Tracy has no idea what he's getting into when a dancer hires him to trace her old boyfriend, based on some letters he sent her about moving to Hawaii.
Tom is hired to protect a woman's husband from an ancient death curse.
Tom is suspicious of columnist Karen Ward's new boyfriend, an ambitious singer.
A vacationing Iowa girl inherits a small island, and then vanishes.
Two young Japanese visitors, Hiroshi and Susumu, ask Tom to locate an old man named Noburu. Tom finds him but is reluctant to tell his clients until he knows the reasons for their search. Tom finds out that that the young Japanese men plan to kill Noburu in order to avenge their family's honor.
Returning from Hong Kong, Tracy's plane is hijacked.
When an expensive diamond in their care is stolen, Tracy and Tom suspect a security leak inside their offices.
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.
Handsome Somerset Jones takes a romantic interest in Cricket. Consequentially distracted, he pays no attention when he receives a credit card which belongs to man marked for death by a hired killer. Somerset and Cricket inadvertently become the targets of the hired killer and Tom must save their lives.
Tracy Steele is hired by Arthur Goodwin's widow to break her late husband's will. The bequest of Arthur Goodwin is the family business - left to a secretary who seems intent on destroying it.
A beautiful girl is used as a lure in a plot to deprive a pineapple heir of the family fortune. Jim McLaren, slated to inherit a pineapple fortune, may fall heir to a murder charge instead. Tracy has his eye on the girl who figures in the frameup, orchestrated by the boy's uncle in order to gain control of the family's money.
A hotel violinst asks Tracy and Tom to guard his valuable instrument. But the fiddler himself needs guarding because his ex-wife and the former boyfriend of his current wife are out to murder him. They startle him into a heart attack, then remove his medication. When Steele manages to get him to the hospital in time to save his life, the killers make a second attempt on his life.
A gambler kills a man in Kim's cab and steals the man's suitcase, which is full of money. Then a girl in whom Kim has taken an interest is kidnapped to prevent Kim from identifying the murderer for the police.
A government agent wants Tracy to help cut some red tape for a lady scientist, but he finds that she is also the target of Red Chinese agents who want to kidnap her.
Lopaka suspects that tennis bum Barry Logan is responsible for the murder of his boss in a quarrel over the boss's wife, but Cricket comes up with an alibi for him and convinces Lopaka to find the real killer, which he does during the course of a tennis tourament.
A typhoon has struck and Cricket, Tracy and Tom take refuge in the island home of a retired Army Colonel. Soon, they are joined by a quartet of bank robbers on the lam.
Steele flies to a French island near Tahiti, where an old army buddy is on the run from a murder charge and faces execution by guillotine.
Lopaka is hired to help a woman sneak an art object into Macao by impersonating her husband, not knowing that she murdered her husband and has the same plans for him.
Hired to protect a spoiled playboy, Steele exposes the perpetrator of a payroll robbery and prevents a murder.
In Manila, Lopaka poses as the brother of a dead nightclub owner to expose a gang smuggling U.S. funds to Red China.
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.
Irene, the princess from Manhattan, is trying to escape from her husband, Prince Abdur, and Tom Lopaka agrees to help. But it doesn't look like Tom's going to be of much assistance when he's taken prisoner aboard the prince's yacht.
Eight-year-old Patty Seldon has lost her boyfriend, Stevie. Cricket decides to have some fun with detectives Steele and Lopaka and introduces Patty as a client. The case becomes more interesting when a ring given to her by the young suitor turns out to be part of something stolen by the little boy's uncle.
A Steamship company hires Lopaka to get evidence on some dope smugglers. They suspect that someone is stowing narcotics aboard their chartered vessels.
Unknown to Steele, one of the Chinese refugee musicians he is guarding is a Tibetan Lama escaping from the Reds. Kim accidentally hears a song being played by Wang Hai, that provides an important clue. Everybody ends up at the Hotel's Shell Bar to hear Cricket & Kim sing ""Jade Song"".
The girl Harmon Kane is seeing is supposedly the daughter of a wealthy man, but in actuality the man posing as her father is an accomplice in a scheme to steal a valuable necklace called ""The Blue Goddess"". When the fake father buys the necklace with a bad check, Lopaka must track him down to recover the stolen goods.
A lottery ticket is Lopaka's only clue in finding an ex-con who's the prime suspect in a tuna warehouse robbery.
Steele is hired to find a kidnapped heiress. The odd thing is that the ransom note actually arrived before she disappeared.
Hired to protect an heiress's privacy, Lopaka becomes suspicious of her boy friend's attempt to play on her guilt over her father's accidental death by having her participate in seances.
Puppeteer Michael Dalli tells his asistant Sandra that he's replacing her with another girl. Then Sandra finds her look-alike puppet crushed. Distraught, she runs out into the streets and is run down by a car. Dalli's new assistant, Mona, then finds her puppet strangled, and Steele is called in to investigate.
Tom Lopaka pursues escaped killer Ed Grimes to Hilo, where he is sheltered by his wife Dora until Tom shows her that he has taken up with a new girlfriend.
Tom, who is dating the sister of prize fighter Joey Steck, uncovers a plot to fix his upcoming bout against a local favorite.
Otto Von Helgren proposes to sail a raft across the Pacific Ocean ""in the interests of science"" - and a substantial grant from the Pacific Foundation. However, Abner Dexter, an officer from the Foundation, suspects a swindle when Von Helgren refuses to be photographed. Tracy is asked to investigate and calls on Rex Randolph of 77 Sunset Strip to help him expose the fraud.
Tom Lopaka tries to unravel a conspiracy to kill an orchid grower and steal his most valuable specimen.
Tom Lopaka manages to talk an executive out of committing suicide by convincing the man that he will find the person who's been blackmailing him, but in order to accomplish this he must induce his old friend Greg MacKenzie to come to the islands to finger the bad guy. Greg is so taken with Hawaii that he decides to stay, and becomes a member of their detective agency.
Six Navy men discover they have something in common - they're all engaged to the same woman. They hire Tom to find her and get the money back that they each gave her for expenses.
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.
Someone has just murdered award-winning artist Gordon Montaigne, and Tracy Steele gains the help of a blind girl in serving as bait to catch him.
To expose a waterfront loan shark, Tom Lopaka poses as a loneshoreman who needs a loan.
Micho Koyoto is a Japanese marine who has been a castaway in the Solomon Islands for more than fifteen years. Out to cover a big story, magazine writer Gloria Matthews asks Tracy to help find him. Koyoto is the heir to an industrialist's fortune, but first they must convince him the war is over.
Bill Sinclair brings a rare statuette called the Manabi Figurine to Greg for safe keeping pending its appraisal, and hoped for a tidy profit on the archaeological find for himself and his partners. The figurine is stolen from Greg's safe and a murder is committed. Greg and Tom work with Lt. Quon to track down the killer and recover the figurine.
Although Jean Morgan was found not guilty of her husband's murder, the public apparently is still not convinced. Jean hires Tracy to find solid proof of her innocence, while her stepson, Tony Morgan, hires Tom to find conclusive proof of her guilt.
Tom listens in on Kim's taxi radio and gets an alarming earful. Kim and his passanger, a girl named Joan Carmichael, are being forced at gunpoint to take a ride. Tom uncovers a murder while attempting to locate Kim and his passenger.
MacKenzie (Grant Williams)runs to help when a car comes tearing down the street, barely misses him, and crashes to a stop. But he's too late. The man behind the wheel is dead - from a shotgun blast.
The shooting and robbery of the island's favorite drive-in owner spurs Tom into action, while the Hawaiian Village Hotel's new social director Phil Barton and Cricket believe that Tina Billings knows more about the crime than she should.
Concert violinist Stafford Price is fond of his $20,000 Stradivarius. Unfortunately, he's not the only one. When the violin is stolen, it's up to Tom and Phil to recover the valuable instrument.
Cricket's friend, Luana Mathes, leaves her baby on Cricket's doorstep to keep him away from his grandfather, who is trying to take the child away from her. Meanwhile, Tom is hired by the grandfather to find both mother and grandson. His ire when he finds that Cricket and Phil have been keeping a secret from him is short-lived when he discovers a kidnap plot.
Ralph Mason wants Greg to find out the name of his lat wife's lover. Evelyn Mason was killed in an automobile accident after leaving the mysterious man.
Tom adds an old pal, Glen Thompson, to the agency's security staff. Soon after, a jewelry store robbery where Glen is injured puts them both on the spot. Tom is confused. He knows Thompson too well to believe that the obviously inept thieves could have outsmarted him.
Phil's cousin Lucy McDowell is nice, unattached, and Hawaii-bound. Phil and Cricket's plans to entertain Lucy hit a nasty roadblock when a disreputable writer-type named Victor makes a play for the girl.
Newscasters Van Baxter and Steve Talbot have been publicizing a series of unsolved crimes which culminated in the death of Steve's wife. They pressure Quon into arresting the boyfriend of Phil's part-time secretary, Lois Corey. Phil steps in to clear the innocent man, with some help from Cricket and Greg.
A prowler disturbs the sleep of fading movie queen Nora Stewart, who is vacationing in Honolulu before attempting a comeback in Hollywood. A routine check by Greg reveals that every member of Nora's entourage has reason to prevent her comeback. He then sets out to discover which one is disturbing the actress. Kim provides the needed clue.
Jack Hogan plays Eddie Croft, a racing driver who lost his nerve and is bitter at the world . . . until he meets a blind girl named Kini (Angela Dorian). Barton: Troy Donahue. Lopaka: Robert Conrad. Benson: John Carlyle.
A woman is torn between her lawyer and her estranged husband.
When a security guard is murdered and a valuable map is stolen from the collection of the late Professor Coleman, Tom finds he isn't short of suspects. Coleman had willed the entire collection to a university and left nothing to his daughters, his Hawaiian ward, or his loyal assistant.
When a trumpeter is blacklisted, Phil and Cricket try to get him a job.
A wealthy widow falls for a faith healer's con game, but Cricket and Phil have to rescue her when she starts to cause trouble after moving into Brother Love's rest home.
Greg MacKenzie falls for vacationing Nora Cobinder, but then finds she is a target of killers because of something that happened to her sister some years earlier.