The hero, a janitor played by Chaplin, is fired from work for accidentally knocking his bucket of water out the window and onto his boss the chief banker (Tandy). Meanwhile, one of the junior managers (Dillon) is being threatened with exposure by his bookie for gambling debts unpaid. Thus the manager decides to steal from the company.
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.
Charlie and his partner are to deliver a piano to 666 Prospect St. and repossess one from 999 Prospect St.
A lottery win of $5,000 forever changes the lives of a miner turned dentist and his wife.