It's the Wild West all over again when a hot-headed young Texan hires Magnum to find his sister.

First part of what was originally shown as a feature-length story. Nuzo, an old war comrade of T.C. and Magnum's, suddenly arrives in Hawaii, and finds T.C. to warn him that Colonel Ivan, a sadistic Russian agent who once held them captive and tortured them in a P.O.W. camp in Vietnam, is after them. At first, T.C. puts his old buddy's fears down to delayed stress, but it gradually begins to seem that there might be some truth in his claims. Meanwhile, Lt. MacReynolds resigns from the Navy, and Magnum lets him stay with him for a few days, but a fatal accident meant for Thomas - as yet unaware of Nuzo's warnings - adds ground to the fears that maybe Ivan is on the trail after all...

Conclusion of this feature-length / two-part story. As Magnum, T.C. and Nuzo plan to get to Ivan before he kills them, the Navy – inparticular Colonel Greene and Admiral Hawkes – have their own concerns in the situation and questions regarding Mac's death. But things are not as previously thought about Nuzo, and not only is T.C.'s life in great danger, but many other people's too as a result, in part of an assassination plot of a Japanese prince...