The ex-wife of notorious thrill-seeker “Mad Buck” Gibson enlists Magnum to safeguard her aging ex-husband, a hell-raiser undeterred by time. With Buck set to crash at Robin Masters’ estate, she demands Thomas keep him alive long enough to pay overdue alimony. Buck’s reckless arrival—crashing down in a daredevil parachute stunt that injures Higgins—proves the challenge. As Magnum struggles to rein in the adventure author’s death-defying antics, he uncovers a dark secret fueling Buck’s apparent quest for self-destruction.