Fatty invents a liquid with flubber-like properties which makes objects resilient and unbreakable. Unfortunately, in his rush to get out of the house to demonstrate his invention, he unknowingly grabs a jar of moonshine instead of the jar which holds his wonder liquid. To make matters worse, as he drives to the demonstration, a football-sized beehive falls from a tree onto the cargo bed of his truck . . .

At the height of the Great Depression, Tommy's mother has been out of work for months when Eddie's father loses his job. Eager not to burden their parents, the two high school sophomores decide to hop the freight trains and look for work.