Gordon Miller (George Murphy) has a hit in the works, especially since he latched onto a playwright whose real talent is his singing voice. Now all that flimflamming Miller must do is put his musical revue on stage before the rubber check underwriting it bounces his troupe from Broadway to the Bowery. As the typewriter-toting crooner, Frank Sinatra steps into his first top billing in this antic backstage musical based on the Broadway/Marx Brothers movie hit Room Service. With a nimble cast (including Gloria DeHaven, Adolphe Menjou and Walter Slezak) and buoyant Sammy Cahn/Jule Styne songs to go with farce, footlights and Frank, what else can a movie do but Step Lively?