The space capsule "Lunar Lady" blasts off from Earth on a voyage to the moon with Dr. Braun, Percy and Henry Applegate on board. Upon their arrival on the moon they become aware that there is unrest between the "Nams" of the light side and the "Nooms" of the dark side. It just so happens that one bite from one of Henry's apples causes the both sides to forget their feud and become friends once again.

To celebrate peace on the moon, King Linus throws a "Galaxy Gala" and invites all the

planets to attend. Mercury Mercurial gets the speedy invitations out to "Queen Venus" and her court, the "Kazooties" of Mars, "King Jupiter", the "Saturnettes", the "Uranus Rockers", "King Neptune" and his Mermaids, and "Nicky" and his gang from Pluto.

A grand time is had by all but suddenly Percy reminds everyone that the "Lunar Lady" must return to Earth. Henry asks the Princess Aurora to marry him and return with him now that peace and friendship have been restored on the moon and in the galaxy. There is a happy ending for all, including the little green stow away on the trip back!