"A voyage aboard a super-luxury Caribbean cruise liner seemed a groovy way of mixing business with pleasure for the Partridges. When they weren't entertaining the thrilled passengers with their great sounds, all the fun-loving Partridge crew were free to entertain themselves. There was golden sunlight, silvery moonlight, glowing romance - until the theft of a fabulous necklace turned a beautiful trip into a bummer. Suddenly rock's first family were over their heads in a raging sea of danger, and they either had to battle against a rising tide of evil, or plunge to the darkest depths of deadly peril..." Red edges.