When a meteor comes crashing to Oz, Dorothy and the gang discover that it contains a clue that could lead them to the location of the silver slippers, all the way up on the moon! Enlisting the help of Smith and Tinker, the guys build a space ship that sends them right to the moon. But the Wicked Witch and Wilhelmina are right on their tail with a rocket ship of their own. Dorothy and friends land on the moon and with the help of the moon's residents, the Moonies, they find the clue that may finally lead them to the silver slippers' location. But the Wicked Witch is determined to get it first.