Double bill of 1940s musicals starring Frank Sinatra. In 'Step Lively' (1944), Broadway producer Gordon Miller (George Murphy) is broke and cannot afford to pay his enormous hotel bill. He needs to put on a revue in order to make enough money to clear his debts, and so plans to use a script by young playwright Glenn Russell (Sinatra). When Russell arrives at the hotel, he soon becomes infatuated with Miller's girlfriend, Christine (Gloria De Haven). Sinatra made his acting debut in the 1943 film 'Higher and Higher'. When a well-known socialite (Leon Errol) goes bankrupt, his valet (Jack Haley) hits upon a scheme to restore his fortunes and save his mansion. They persuade the scullery maid (Michele Morgan) to pose as his daughter, and then court and marry a wealthy young man (Sinatra).