Magnum wakes up in the hospital with amnesia and the Ferrari totalled. As he tries to put the pieces of the puzzle together, he remembers investigating the case of a missing woman. But, the girl turns up murdered and Magnum is considered the prime suspect when his baseball cap is found at the murder scene.

When an old Naval Academy friend and teammate, Dorsey Bramlett, now a professional quarterback, is nearly murdered, he asks Magnum to go undercover at his football team's training camp to protect him. Magnum's job is made all the more difficult by the strenuous workouts he must endure in training camp!