When the mummified remains of a woman are found during a rescue operation in a cave, the body is discovered to be the ex-wife of a chief constable. The detective duo are called in to investigate, putting their lives are put on the line as they brave treacherous conditions to uncover more evidence at the scene of the find.
The actual Playmate for October of 1974 was Ester Cordet, a brown-haired Panamanian, in contrast to the blondeness of the film's Helen Shaver. The actual Playboy centerfold seen in the film is of Debbie Ellison, Miss September 1970.