Cab Calloway, an up and coming jazz musician is putting together a band; he is looking forward to making it big as the bandleader. His girlfriend Minnie, however, was upset that Cab has retained the services of a female band manager, Nettie, to help him promote his band and get his first big break. The manager allows the musician to get a chance to audition his jazz octet before the local owner of the new club, which he then signs the big band for its opening. Minnie becomes suspicious and jealous that Calloway's manager is doing good things for Cab and is winning points with him. When Cab auditions with his octet, the new club owner is impressed; however, he needs a more successful band for his club's opening. Calloway promises that he could easily recruit more band members, getting the job. The band leader plays at the club's opening at week's end. When he and his band succeed, Minnie gets intensely jealous and goes to a local "fix-it" man Boss Mason, who uses gun man Mo the Mouse as his "assistant". Calloway's wife starts to play both sides of the fence in wanting to be his girlfriend, while also trying to keep Cab in place so that his relations with Nettie have "no chance to blossom". When Boss Mason gets too close to Calloway, the jazz musician must defend himself against Mo the Mouse before the bullets fly. ==Cast==