Moonie Moonbug likes living on the moon with her family and her friend, Buggy the Bug. Their favorite food is fruit, especially cherries. One day, Moonie decides to take a trip down to Planet Earth in her moon bubble. While playing football in the garden, a little boy called Kai spots Moonie in her moon bubble.
Moonie, Kai, and his sister Natalia become friends and go on an adventure to the moon. Moonie also explores Earth by going to Kai and Natalia's school to meet their class. Moonie enjoys her stay on Earth, meeting other Earth creatures, such as Figgy Frog and Simmy Spider.
But she knows she has to return to her own home and family. In her heart, she also knows she will miss everyone, especially her new friends, Natalia and Kai.