Harry Doolittle wakes up on the day he's to marry Betty Bright. He has a terrible hangover. A strange woman appears in his room saying that he married her the night before, and just then, his fiancée and her mother arrive. There's anger all around, leading to Harry's arrest. He's jailed while awaiting trial in front of Betty's father, a judge. She visits him in the clink. He escapes and disguises himself as a cabman. The police are looking for him, as are his fiancée and her mother. Will it get straightened out in time for wedding bells to ring?