Leon, a young boy is out fishing at night when the moon goes dark. He is magically transported to the Moon, where he meets Moongirl, who he helps try to fix the moon.
The film came about after Laika held a contest for a short film idea. CG modeler Michael Berger’s idea of a girl who controls the moon was chosen, and Selick was hired to develop the short.Selick brought on They Might Be Giants to do the score after connecting with them through Courtney Booker, who worked on the music video for “Bastard Wants to Hit Me”.
Plot summary: Wikipedia