As novice detectives, Bud and Lou come face to face with the Invisible Man.

Harry and Willie are scammed into buying the Thomas Edison studio lot by a man named Gorman. They decide to follow Gorman's trail to Hollywood where, unbeknownst to them, he has taken the identity of a foreign film director. The lads wind up as stunt doubles in film the which Gorman is now shooting, while the conman tries to have the bungling pair done away with before they realize who he really is.

Lost Caverns Hotel bellhop Freddie Phillips is suspected of murder. Swami Talpur tries to hypnotize Freddie into confessing, but Freddie is too stupid for the plot to work. Inspector Wellman uses Freddie to get the killer (and it isn't the Swami).

Molly, her brother, Slats, and his pal, Oliver, are taxi dancers at the Miramar Ballroom. As a publicity stunt, Slats plants an article about Molly claiming her ambition is to earn enough money to attend staid, all-girl Bixby College. Bixby's progressive dean offers Molly a scholarship. Molly accepts on the condition that Slats and Oliver come along too as campus caretakers. But the pompous Chairman threatens to foreclose on the school's mortgage if Molly isn't expelled. Together, the trio, with the help of some new friends, concocts a scheme to raise enough money to save the school. The plan involves a bet on the Bixby basketball team, which is playing in a game rated at 20 to 1 by the local bookie. But the bookie has other plans for their dough and hires a group of ringers to step in for the opponents. All is not lost, at least while Oliver has the chance to turn things around for his friends-one way or another.

Flash Fulton (Bud Abbott) and Weejie McCoy (Lou Costello) take pictures of a bank robbery. Lured to the mountain resort hideout of the robbers and accompanied by Dr. Bill Elliott (Patric Knowles) and Peggy Osborn (Elyse Knox), they also meet old friend Johnny Long (Johnny Long) and his band and singer Marcia Manning (Ginny Simms). Dr. Elliott and Peggy are being held in a remote cabin by the robbers, but Weejie rescues them by turning himself into a human snowball that becomes an avalanche that engulfs the crooks.

The wealthy and impulsive Rollo Treadway decides to propose to his beautiful socialite neighbor, Betsy O'Brien. Although Betsy turns Rollo down, he still opts to go on the cruise that he intended as their honeymoon. When circumstances find both Rollo and Betsy on the wrong ship, they end up having adventures on the high seas.