A painter turned tramp (Chaplin), devastated by losing the woman he was courting as a wealthy man, finds himself drunk and getting drunker by the minute with some sailors at a bar until he's literally falling down. He keeps futilely trying to draw the woman's picture on the floor with a piece of chalk until he finally passes out cold (or perhaps dies, as in the poem) at the end of the film.
Charlie begins to woo a woman on a bench, only to have her seaman boyfriend object. After a brick fight between the two men that eventually involves two police officers, all five people end up in the local pond to cool off.
Mabel tries to sell hot dogs at a car race, but isn't doing a very good job at it. She sets down the box of hot dogs and leaves them for a moment. Charlie finds them and gives them away to the hungry spectators at the track as Mabel frantically tries to find her lost box of hot dogs. Mabel finds out that Charlie has stolen them and sends the police after him. Chaos ensues.
On his way to a restaurant, Ambrose, a happily married man, obliges to mail a letter for a woman in the apartment lobby. Unbeknownst to him, the letter is about a rendezvous with her own lover at their "trysting place". Elsewhere, after some domestic frustration, Charlie runs an errand to buy a baby bottle before stopping at the same restaurant. After a confrontation there, they both inadvertently leave with each other's coats. Later, their wives independently discover what appears to be incriminating evidence of extramarital affairs from the pockets of the swapped garments. It all comes to a head when all four of them find themselves at the "trysting place" in the park.