The owner of a large mansion in the country throws a costume party for some of his friends. However, the party turns sour when he is found stabbed to death in a closet.
A young man desperately in love with a nightclub singer sees an opportunity to spend some time alone with her when they're traveling through the Nevada gold country, and he takes the carburetor off her car and throws it in the river, stranding them there.
Mazie, a poor orphan girl, is mistreated by cruel farmer Slag and his wife for whom she works. Mazie, who is growing into a woman, does not like they way Slag has been looking at her lately.
While streetworker Mickey romances Minnie, Mickey's nephews Morty and Ferdie take control of his steamroller and it's full speed ahead on a very destructive ride.