The short opens with Prof. J. O. Dunkfeather telling a reporter how he solved a mysterious case. The scene fades to the Stooges, who are three door-to-door peddlers trying to sell their "Miracle Reducing Machine." After several rejections and walking for miles, they come across the home of Mr. Graves, a mad scientist who has invented a new death ray ("It'll kill millions!"). Mr. Graves mistakes the Stooges for his new caretakers, and he leaves them to guard his home while he is in Washington. Three spies are out to steal Mr. Graves' plans, disguise themselves in Halloween costumes to scare the Stooges away, but some unseen hand keeps hurling pies at them. The Stooges end up confronting the spies, and Curly unintentionally blows them up with a bomb, at which point the Stooges are all hit with pies simultaneously. "Who threw those pies?!" 1943
