Magnum returns from a case to find that Higgins' old Army commander is staying on the Masters Estate, under tight security, until some IRA 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' trail, but the ""need to know"" basis the Agents insist on operating by only serves to complicate matters for Magnum...

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