After watching The Adventures of Super Numtum, Little Sandy decides she wants to be the first Numpup on the moon, so she builds a space rocket and blasts off. But when she crashlands in the Big Sandy Desert, she believes she's actually landed on the moon. Meanwhile Gladdy's inflatable crocodile, Neville, escapes. While the other Numpups and Gladdy search for Little Sandy, she explores what she thinks is the moon, mistaking Neville the inflatable crocodile for an alien. And it's up to the other Numtums to find her! Meanwhile, on the Adventures of Super Numtum show, Fluffy plans to end bedtime forever by switching off the moon.