Gene Kelly and Frank Sinatra (in his first major film role) are two sailors who spend their shore leave in Hollywood, and turn it and other parts of L.A. into their own screen playground. "Based on ideas that are essentially Kelly's own - the musical visualization of children's dreams" (Albert Johnson) are two of the film's enduring highlights: In a world of color-book landscapes, Kelly dances an ingenious duet with the mouse-king Jerry, a creation of animated special effects. And, taking off from the colorful Olvera Street of reality, he charms an unsmiling little girl with his natural exhuberance and his own version of the Mexican Hat Dance. "One can identify in the sailor Kelly's personal screen creation of contemporary man as a bell-bottomed pierrot...." (Albert Johnson). Meanwhile, songs by Jules Styne and Sammy Cahn keep Frank Sinatra busy.