Using their secret formula for lunar propulsion (derived from the mooseberry bush), Rocky and Bullwinkle meet moon men Gidney and Cloyd. They explain to the moon men that they are from Frostbite Falls, and how they got to the moon in the first place (Bullwinkle’s recipe blew the stove to the moon, so they had to get it back). Returning to earth, Rocky and Bullwinkle walk into a trap. No sooner do they escape the perils of Pottsylvania than, while mountain-climbing the Grimalayas, they encounter the moon men trying to get home. With Rocky and Bullwinkle’s help, Gidney and Cloyd flunk their citizenship tests, and they are deported back to the moon.