 Ray Ferrera, star saxophonist in the prison orchestra, gets out and is hired by big bandleader Jack Conrad; the band leaves on a cross-country tour in Jack s luxurious, airplane-shaped bus. At first, all goes well for Ray: he replaces drunken Ted Webb as star Jean Loring s dancing partner (and lover). But old associations get Ray in trouble when the band is victimized by gangsters. Finale is a classic careening car chase.