Lieutenant Ted Jackson (Elvis Presley) is a former U.S. Navy frogman who divides his time between twin careers as a deep sea diver and nightclub singer. Ted discovers what he believes could be a fortune in Spanish gold aboard a sunken ship and sets out to rescue it with the help of go-go dancing yoga expert Jo Symington (Dodie Marshall) and friend Judd Whitman (Pat Harrington, Jr.). Gil Carey (Skip Ward), however, is also after the treasure and uses his girlfriend Dina Bishop (Pat Priest) to foil Ted's plans.
Elvis sings six songs in the movie: the title song, "I'll Take Love", "Sing You Children", "You Gotta Stop", "Yoga Is as Yoga Does" in a duet with Elsa Lanchester, and "The Love Machine".
With whom does Elvis sing a duet?
Elsa Lanchester