Mother O'Day continues to run her Bowery saloon after her husband, Tim, is killed in a barroom brawl, but wishing a better environment for her daughter, Molly, she has her placed in the home of Mrs. Kendall, a refined society woman. Years later, in the prohibition era, Mother O'Day's saloon has become a cabaret frequented by Molly is now a selfish, snobbish flapper, and her set, which includes adventurer Mark Roth. Mother O'Day knows Roth to be a crook and with the aid of reporter Cliff Kelley, Molly's childhood sweetheart, exposes him to Molly, who finally recognizes her mother and is gladly reunited with her.