This fast-paced Warner Bros. comedy stars James Cagney and Pat O'Brien as brothers who fight over the same girl. Mrs. O'Hara (Mary Gordon) is the loving mother of three sons: fireman Mike (Frank McHugh), policeman Pat (O'Brien), and the boxing promoter Danny (Cagney). Mike wants to marry Lucille Jackson (Olivia deHaviland), the daughter of his boss, Captain Jackson (John Farrell MacDonald). However, Lucille falls for Danny, causing a fued between the two brothers at the Fireman's Ball. Danny believes he can make a fortune when he meets up with boxer Carbarn Hammerschlag (Allen Jenkins), who starts fighting whenever he hears a bell. On the night of his big fight against champion boxer Joe Delancey (Harvey Parry), Carbarn gets a toothache and Mike gives him some gin. He ends up getting drunk in the locker room and Danny has to fight Delancey in his place. With the help of his brothers, Danny wins the fight and the girl.