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 Soong"", until it's 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...

Magnum tries to impress a beautiful "fan" of Robin's that he befriends, by showing her the Robin Masters estate, only to learn that she is actually a top security expect hired by Robin to test the estate's security. The security company she works for has been hired after Robin's life is threatened if he publishes his latest manuscript; and with him heading for one of three possible locations to collect some dictation tapes, she asks Magnum's co-operation in seeing that the estate is on top security in case it is the destination he's heading for. With the additional aid of T.C. and Rick, Robin's Nest is soon turned into a heavily guarded fortress, but there are parties out trying to see that Robin never makes it to his destination.

Thomas is hired to follow Angie, the wife of his client Clarence, to see if she's being unfaithful. After watching Clarence in the ring training for his next title bout, Thomas is extremely reluctant to be the bearer of bad tidings. Clarence assures him that he wants proof that Angie is cheating, so that the fight's multi-million dollar purse won't be part of the settlement negotiations in the divorce proceedings she initiated. While he's on Angie's trail, Thomas meets a priest at the airport who turns out to be Higgins's Irish half-brother Paddy. Higgins isn't thrilled to see his sibling, especially when he discovers that Paddy has followed Ffolkes, Higgins's former commanding officer, to Hawaii after suspecting Ffolkes of stealing a relic during a search of Paddy's church for I.R.A. weapons. Paddy intends to hold hostage a certain English relic he pilfered from the custody of Ffolkes and Higgins until the one from his church is returned until Thomas steps in to mediate the standoff a