A woman who is writing a book about road signs hires Magnum because someone is following her and attempting to steal something but she does not know what it is.
Magnum is in Los Angeles serving a writ when he meets a woman who is later murdered. Magnum sets out to find the killer and possibly finds his soulmate.
Magnum is being awarded the Local PI Of The Year Award when the presenter, French detective Jean Claude Fornier, collapses and dies. Thomas, aided by several other PIs, sets out to find the murderer.
Magnum saves the life of a native Hawaiian girl who witnesses a hit. Wounded in the getaway, Magnum is nursed back to health on the forbidden island of Kapu.