Elvis Presley plays a Navy frogman, who later as a civilian dives for buried treasure. Dodie Marshall plays a disco dancer and yoga student that ends up helping the former frogman. Pat Priest plays a playgirl that ensues the aid of her boyfriend (Skip Ward) to try and foil the recovery of the treasure chest. Pat Harrington plays the owner of a little club where he lets the unsinkable diver to sing. Six badly recorded songs and a horrible yoga class scene brings this flick to bottom feeder rank in Elvis' movie career.