 Bandleader Cab Calloway is tiring of his sexy girlfriend Minnie, who in turn is jealous of Cab s manager Nettie. When Nettie gets Cab a job at the Brass Hat Club, Minnie retaliates for his imagined infidelity by setting gangster Boss Mason, owner of a rival club, against him. Will she regret her action before it s too late? (This plot resolves halfway through the film; the rest is a series of  soundies  featuring the Calloway band s inimitable jive). All-black cast.