A mysterious rock falls to earth landing in the middle of Gordon’s lawn. Then a rocket lands in the flowerbed, piloted by Armstrong Gnome, the Gnome on the Moon. Armstrong proves to be a bit of a whiz with rocks and helps Gordon more the rock to build a rockery. He even lets Gordon drive his moon buggy. At the end of the day, the Chief Gnome brings his telescope and the Gnomes learn all about Armstrong’s mission to grow flowers on the moon!