Maggi Parker

Five-O goes into action when a Honolulu racket boss, Tokura, runs into serious difficulty with a secret Japanese society. McGarrett finds he must protect Tokura even though he is trying to convict the racket king for his underworld activities. To do this, McGarrett enlists the aid of Tokura's beautiful daughter Deedee, who is unaware of her father's double life.

McGarrett must prove his second-in-command, Danno, is innocent of shooting an unarmed teenage suspect.

McGarrett must make sure his key witness, a mobster's associate, lives to testify against the crime kingpin.

After an aging baroness disappears, her two nephews become key suspects in a surprise-filled case that pits McGarrett against a serial killer.