Making Monkey Business

Billy Davis discovers that his father's bakery business is in serious financial trouble and leaves college in order to help his family.

Angered by his son Dick's boastful ways, which in one incident lead him to lose a business deal, an automobile manufacturer challenges him to complete four difficult missions.

Muggsy Mulane, a waif who wears boy's clothing, jumps a freight train to the country after Jimmy "the Eel," the leader of the gang of crooks with whom she works, is arrested. In the village of Cottonville, Muggsy befriends Aunt Sarah, whom she later discovers is Jimmy's mother. When Muggsy learns that the greedy Judge Cotton, who holds the mortgage on Aunt Sarah's property, is planning to foreclose, she threatens to blackmail him, and he relents.

A New York fur saleswoman falls for a man she meets on the subway and must decide if she wants to accept a much dreamed for work transfer to Paris, or stay and get married.

Anita Gray is the spoiled daughter of a millionaire. Returning home from a party, her car breaks down and she is picked up by a stranger, who sells her his car for a diamond bracelet. The car has been stolen and the police arrest her, but she escapes and takes refuge on a freighter bound for China. She has no money and has to work her way there. Her father learns of her destination and hires Hamlin to bring her safely home.

Harry and Tillie are preparing to elope when her dad appears and boots his would-be son-in-law out of the house. Tillie is locked up in her room, and to regain her liberty feigns illness and apparently swoons. Dad is troubled and telephones for a doctor. Harry, who is hovering around the corner, sees the doctor coming and bribes him to help him in a scheme to see Tillie.

After his defeat at the hands of "Spider" Flynn, the welterweight champion of Europe, boxer Jimmie Dolan and his trainer, Thomas Jefferson Jones, leave for a principality near Paris. Having lost all their money on the fight, Jimmie accepts Count Conrad's offer to impersonate Prince Frederick in return for a large sum of money.

George is addicted to the flowing cup, and his friends all try to reform him. His intentions are good, but his will is weak and he cannot resist the companionship of bibulous friends. Drastic measures are resorted to, to cure him. One of his friends dresses as a woman, who presents a fierce aspect. When George awakens he is told that while under the influence of liquor he has married his woman, and she proceeds to assert herself. George is in a terrible mental state, but finally he sees the shoe of the "woman" who has forgotten to change those pedal protectors, and the scheme dawns upon him.

Adele Moore pressured by her father to choose a husband among four men consults a fortune teller for advice. The crystal ball warns none are suitable so Adele does a flit. Settling in Vermont she opens a store. Business is slow but one day a passing salesman walks in and things begin to look up!

Harpo played the hero, a detective named Watson who "made his entrance in a high hat, sliding down a coal chute into the basement". Groucho played an "old movie" villain, who "sported a long moustache and was clad in black", while Chico was probably his "chuckling [Italian] henchman". Zeppo portrayed a playboy who was the owner of a nightclub in which most of the action took place, including "a cabaret, [which allowed] the inclusion of a dance number". The final shot showed Groucho "in ball and chain, trudging slowly off into the gloaming". Harpo, in a rare moment of romantic glory, gets the girl in the end. This film is lost.

Male and female sales agents, Phil and Ruth, for rival hosiery concerns try to land an order. For a while Phil succeeds and puts on an exhibition but Ruby makes the mannequins use her own brand of hose, flirts with the buyer and wins order away from her rival.