Alfalfa can't eat, since he's obsessing on Darla. His dad, thinking it's a more serious problem, gives him a stomach remedy prepared with Settles-itt Powder. The gang goes over to Butch's garage, where he convinces the gullible kids that he's preparing dynamite right before their very eyes. Alfalfa notices that the main ingredient is Settles-itt Powder, and drinks the whole thing down to the astonishment of the gang. Then his stomach swells to extreme proportions, and he now thinks he's swallowed dynamite.