Conway and Lambert end up on the same ship and it is there that Conway learns she only has to be 18 to get married in Sweden, where she tries to encourage Lambert to take her. During this time, a pair of thieves takes Lambert's suitcase so they can smuggle some diamonds into the country. Lambert notices that he’s had to save Conway twice and that someone tried to run him over and Conway explains everything. The pair goes on the run trying to save their lives and let Conway make it to age 18 to protect her inheritance.
Part of the Elvis: 75th Anniversary DVD Collection, Double Trouble shows just how far out of touch musically Presley's people had become as there is a scene where he sings "Old MacDonald" on the back of a truck. This was while the Beatles were releasing Sgt. Pepper and Jimi Hendrix had Are You Experienced? Presley clearly deserved better than this. That said, the movie itself isn't terrible, has some clever plot twists and amusing cameos from a talking parrot and the Wiere Brothers as bumbling cops.