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In his 32nd film for Keystone, Charlie Chaplin is a married man, an unusual state for his film character. His wife, played by Mabel Normand, complains that they have no money for new shoes for her or food for their baby. They have a fight and Charlie leaves, promising to bring a present home for their son. Meanwhile another couple in a hotel room are rather lovey, as the wife (Phyllis Allen) helps hubby Ambrose (Mack Swain) prepare to go out. On his way out, a young lady who has just completed a love letter asks Ambrose to mail it for her. He puts the letter in his coat pocket. Charlie goes to a drug store and buys a bottle for the baby, which he puts in his coat pocket. He proceeds to a diner where, coincidentally, Ambrose has gone for lunch. The pair get into a funny food fight at the lunch counter, and switch coats accidentally. When Charlie arrives home Mabel finds the note in his pocket and flies into a rage, eventually breaking an ironing board over his head. Charlie escapes to a nearby park where Ambrose has met his wife who consoles him over the beating he has just taken from Charlie. Calmed down, Mack goes to a nearby refreshment stand. Mabel has by now caught up with Charlie and is delivering quite a beating, which delights Mack. Meanwhile, Phyllis has found the baby bottle in "his" coat pocket and when he returns to their bench she berates him for his infidelity. When Mabel shows Charlie the note she has found, he examines the coat and the mystery is solved. The two men exchange coats, but when Charlie returns the love note to Mack, Phyllis attacks him with her umbrella. But Charlie, Mabel and their baby are reunited in a picture of connubial bliss.