Race car driver Lucky Jackson (Elvis Presley) pulls into Las Vegas, ready for the city's first-ever Grand Prix. All he needs is enough money to buy a new engine, so he takes a job as a waiter at a casino. Lucky finds time to court the beautiful swimming pool manager, Rusty Martin (Ann-Margret), with his crooning skills -- but both the race and Rusty may be up for grabs when rival Count Elmo Mancini (Cesare Danova) rolls into town.