In this musical comedy, a crooked record producer uses his mob connections to force performers to do their stuff. The trouble really begins when the gangster's strong-arm tactics nearly cause a singer to lose his fiancée. A wide variety of entertainers appear including cowboy crooner Gene Autry, baseball hero Joe DiMaggio, and big band stars Cab Calloway, Ted Lewis, and the Kay Thompson Singers. Songs include "Mamma I Wanna Make Rhythm," "Manhattan Merry-Go-Round," "Heaven?," "I Owe You," and "It's Round-up Time in Reno."