In the opening two-part episode of Magnum, P.I. (originally telecast as a single two-hour "TV movie"), Hawaii-based private detective and former Naval Intelligence officer Thomas Magnum (Tom Selleck) is already comfortably installed as head of security at the lavish estate of wealthy mystery writer Robin Masters, and well into his genially adversarial relationship with Jonathan Higgins (John Hillerman), the never-seen Masters' snobbish manservant. Despite his cushy surroundings, Magnum isn't averse to accepting "outside" assignments--nor is he immune to trouble being thrust upon him unexpectedly. That's what happens on this occasion, when Magnum's old Vietnam buddy Dan Cook (Allen Williams) turns up dead, with ten bags of cocaine in his stomach. Refusing to believe the offical report that Cook was involved in a drug-smuggling ring, Magnum conducts his own investigation, despite being warned off on several occasions by the authorities--and sure enough, he uncovers a frameup and a widespread conspiracy! Featured in the guest cast is ex-Playboy playmater Lillian Muller, here billed as "Yuliis Ruval." ~ Hal Erickson, Rovi