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24 Hours is all it takes for tippling married man Jim Towner (Clive Brook) to go from social respectability to convict stripes. Upset that his wife Fanny (Kay Francis) has been unfaithful, the wealthy Jim weaves drunkenly from one nightclub to another. He falls for a cabaret performer (Miriam Hopkins) and begins an affair. The girl is killed by her gangster boyfriend (Regis Toomey), but Jim is arrested for the crime. Released from prison, the chastened Jim returns to his wife, who has vowed to remain loyal to her husband. 24 Hours was based on a novel by Louis Bromfield.