Buster plays Elmer "Happy" Triple, a scientist who is expected to develop the next big thing. That big thing ends up to be a powder when combined with water, produces major blasts that make no sound, which catches the eyes of three robbers who want Elmer's secret powder.
When Buster Keaton goes to work as an assistant to a carnival magician, the results turn out to be less than magical.
Buster becomes a fireman, but unfortunately not a particularly good one. He has a chance to prove himself, however, when three women are trapped in a burning building.
