The stooges are private detectives looking for a missing millionaire. They wander around the millionaire's spooky mansion confronting various crooks and a dangerous dame. The stooges vanquish the crooks (Shemp uses his "trusty shovel") and find the missing man.

The fate of the planet in the hands of Larry, Moe and Curly Joe? That's exactly the situation the trio finds themselves in when they befriend a wacky scientist and must defend his secret invention from a pair of malevolent Martians. Sight gags, slapstick and plenty of nyuks abound as the Stooges bumble their way through an adventure of intergalactic proportions.

The Three Stooges travel West where they become heroes by nabbing a gang of would-be robbers.

Joe's wife, who thinks he's been carrying on with another woman, moves out.

Shemp has to get married within seven hours in order to inherit $500,000. Now that's incentive! The bumbling threesome set to work right away with hilarious results.