In the nightclub where entertainer Fannie Field sings, two rivals for her favors, Jerry Moore and Mac McCloskey, come to blows before either realizes the other is a boxer. Jerry loses the fight but wins Fannie, who becomes his trainer with the aid of her schlemiel brother. Aside from a slight tendency to lie down in the ring, Jerry is successful. But success brings the inevitable blonde; does this mean heartbreak for Fannie? Features the star's inimitable ethnic humor.