Part 1 of 2. A fun-loving private detective, living on a luxurious Hawaiian estate, boldly takes on Navy higher-ups and becomes a target for killers when he tracks the cold blooded murderers of his best friend.

Part 2 of 2. A fun-loving private detective, living on a luxurious Hawaiian estate, boldly takes on Navy higher-ups and becomes a target for killers when he tracks the cold blooded murderers of his best friend.

Magnum is hired by a beautiful Chinese antiques dealer that he's making a play for to protect a precious ancient vase, The Soul of Sung, until its buyer arrives in Hawaii to collect it. But unbeknown to him, the priceless ornament is wanted by a Tong gang from the girl's home country, and a deadly martial arts assassin who can kill in the blink of an eye is hot on the trail.

It's the Christmas season, and against his better judgment, Magnum agrees to being hired by five young schoolgirls to find their teacher, who has seemingly gone missing after falling in love. While he's working on the case, Magnum manages to convince Higgins to let the young girls stay on the Masters estate, but he's unaware that he's being deceived in a scam over a valuable painting recently purchased by Robin Masters.

Magnum returns from a case to find that Higgins' old Army commander is staying on the Masters estate, under tight security, until some I.R.A. members he helped capture are tried. Two secret intelligence agents hire Magnum to protect the brigadier and foil assassins out to kill him before the terrorists' trial, but the "need to know" basis the agents insist on operating by only serves to complicate matters for Magnum.

When a beautiful model-actress is killed by a shotgun blast in a scenario closely resembling a scene from the script of an upcoming film, it is seemingly suicide. Magnum is hired by her former producer and lover to investigate any other men that she may have been seeing before her death - a case that Magnum is reluctant to take, but, feeling guilty for not taking it before the girl was killed, agrees to.