Private eyes Mutt and Jeff are on the trail of the ghostly shape-shifting criminal, the Phantom.

When a mysterious figure appears to cause a series of disruptions at the Frisbie Home in New York, word goes out to Scotland Yard that the Fuzz-Faced Phantom is at work. Soon, Charley MacNeesha and his assistant MacGregor are sent across the ocean to investigate.

Charley invents a machine that turns ordinary, breakable eggs into rubbery, unbreakable ones for transport. He builds a Rube Goldberg contraption of parts stolen from his neighbors. Rival egg companies want his invention, one of them stooping to sabotage to get it.