A professor attempts to win a bet by turning the stooges into gentlemen. After some lessons in etiquette, the boys make their society debut at a fancy party. They soon revert to their old habits and a wild pie fight ensues.

The stooges reminisce about their wartime romances in Europe. After they finish their tales, they discover that Joe's girl Fifi, whom he left behind in Paris, has moved in next door. The only problem is that she's now married, with a very jealous husband. The husband turns out to be a real cad, and when Fifi overhears him tell about his plans to find a new wife, she clobbers him and goes back to Joe.

Prohibition-era nightclub crooner Joe E. Lewis has his career and nearly his life cut short when his throat is slashed as payback for leaving the employ of Chicago mob boss Georgie Parker. A broken alcoholic, Joe is brought back from the abyss by his faithful piano player, Austin Mack, who helps turn the former singer into a successful stand-up comedian. But Joe's demons plague his romantic life even as he reaches new heights of success.

A sequel (sort of) to "Hoofs and Goofs", The stooges are taking care of their sister Birdie who has been reincarnated as a horse. When they learn that her mate "Schnapps", a famous circus horse, is about to be destroyed, they got to the circus grounds to rescue him. The stooges are successful, and Birdie and Schnapps are reunited.

An eccentric scientist tricks the stooges into joining himself and his daughter on an expedition to Venus. On Venus, the boys go exploring and encounter some cannibalistic amazons who plan to devour them. The stooges escape and take off in the spaceship which goes wildly out of control. As the ship is about to crash, the scene changes to the annual meeting of the Liars Club, where the stooges win the prize as the biggest liars in the world.

The stooges appear in triplicate as three sets of triplets who were separated a long time ago. Their reunion causes confusion and troubles for various wives and sweethearts, but it all works out in the end.

Joe dreams that the stooge's sister Birdie has died and been reincarnated as a horse. The stooges take Birdie home but must conceal her from the snoopy landlord. They succeed, but more complications ensue when Birdie gives birth to a colt. Joe wakes up to suffer some abuse from the real Birdie (Moe in drag), when he tells her he dreamed she was a horse.

The stooges are would-be reporters, who are tricked into becoming stowaways by "Borscht", a spy for an enemy country. Stranded on a freighter on the high seas, they discover that Borscht has concealed some stolen microfilm in watermelons they brought aboard for him. After a wild chase, they subdue Borscht and recover the microfilm.