The brothers O'Hara are beat cop Pat, boxing promoter Danny and fireman Mike: all Irish and all living under the same roof, except Pat wants to leave the familial hearth to marry his sweetheart, Lucille. Cupid may have other ideas when Lucille and Danny meet, and brotherly loyalty is soon put to the test. A cadre of Warner reliable joins forces in this comedy-drama tale of brothers sharing the same tenement flat. James Cagney portrays firebrand Danny, certain his free-swinging palooka, Carbarn (Allen Jenkins), will be his ticket to ringside prominence. Pat O'Brien, in one of his nine pairings with Cagney, plays all-around good guy Pat. Frank McHugh adds his popular comic flair to the role of Mike. As lovely Lucille, Olivia de Havilland, only weeks after her Alibi Ike debut, continues her appealing screen ascendancy. The actors are joined by another reliable: director Lloyd Bacon, who guided almost fifty films during the 1930s.