It's 1967 and Elvis Presley is on top of the world; and so is his character in Clambake. The rich heir to a Texas oil empire Scott Hayward wants to find out if the girls like him as much as they like his rich daddy's wallet size. So Scott decides to perform an experiment, he declines the position of vice president of his father's corporation and offers to trade Tom Wilson- played by Will Hutchens-a local water ski instructor in a Florida hotel places. And so Scott becomes Tom and Tom becomes Scott. The real Scott Hayward will teach classes and Tom Wilson will find out what it's like to play the role of rich playboy.
As Scott "Tom" starts to give water skiing lessons he falls for fortune hunter Dianne Carter who is after the rich playboy James Jamison III. In order to impress Dianne "Tom" enters the Orange Bowl Power Boat Regatta in order to win and beat out Jamison. However, instead of using one of his three boats in Texas he sticks to his vow to live in the hotel and off of his earnings as an instructor. And so he decides to race a boat built by Sam Burton, which fell to pieces the year before due to its defective protective. "Tom" enters the race in Burton's boat which he fixed with his own experimental "Goop" and wins Dianne's heart
Following the race "Tom" proposes to Dianne and then admits to her who he really is and she faints upon finding out she's engaged to a multimillionaire.
From Clambake comes Presley's songs: Clambake, Who Needs Money, A House That Has Everything, Confidence, Hey Hey Hey, You Don't Know Me, The Girl I Never Loved, How Can You Lose What You Never Had, Big Boss Man, Singing Tree, Just Call Me Lonesome and Guitar Man.
Cast also includes; Shelley Fabares, Bill Bixby, Gary Merill and James Gregory.