Sex-hungry teens are kidnapped by auto mechanics, who take them to a rural hospital run by aliens who need their blood as the key to their own longevity.
After Slip is drafted into the Marines, the rest of the gang volunteers so they can be with him. Sach discovers that the colonel knew his father and he is promoted. During a drill that he is putting the rest of the gang through, they find a soldier left for dead on the side of the road. Slip discovers a playing card next to the marine and traces it to Jolly Joe Johnson's gambling house. They suspect that the gambling house is cheating and set out to uncover the proof.
When Sach eats too much sugar, he goes into a trance whereby he's able to predict the future. Slip tries to make some money off of Sach by using him as a fortune teller in a carnival, until a mad scientist kidnaps Sach to use him in an intelligence-switching experiment with a monster.
Merchant seaman Skitch Kilroy (Jackie Cooper) and "Pappy" Reagan (Jackie Coogan)arrive in Marseilles, eager to resume their combative rivalry for Mimi. But they are ordered by their skipper Muldoon (Ralph Sanford) to remain on board and guard against theft of foodstuffs by a black market gang.
Barnstorming pilots Speed Condon, Bill Adams, and Eddie Smith travel the country with their manager, Alec Dugan, performing at fairs and air shows and hawking rides for the locals. But when Speed's rambunctious flying results in tragedy, he gives up flying in despair and guilt. Alec tracks him down and hopes to get him back on his feet and back in the air.
Skippy, son of Dr. Herbert and Mrs. Skinner, adamantly stands by his poor friend, Sooky Wayne, who lives in Shantytown with his sickly mother. The Boone Boys, a boys' club that costs thirty dollars to join and has uniforms that Sooky admires, refuses to admit him because he is poor. Sooky and Skippy form their own club called the Beagle Boys.
The House That Shadows Built (1931) is a short feature, roughly 48 minutes long, from Paramount Pictures made to celebrate the 20th anniversary of the studio's founding in 1912. It was a promotional film for exhibitors and never had a regular theatrical release and includes a brief history of Paramount, interviews with various actors, and clips from upcoming projects (some of which never came to fruition). The title comes from a biography of Paramount founder Adolph Zukor, The House That Shadows Built (1928), by William Henry Irwin.