Unusual things have been happening in Moominvalley. Moomin, Sniff and Mee leave for the Observatory on the Lonely Mountains to confirm the Muskrat's words: a comet is about to hit Moominvalley and destroy everything. On the way they meet Snufkin, the Hemulen and the Snorks and experience many adventures.

Thousands of years into the future, mankind has colonized other planets across the galaxy and completely forgotten about Earth. On one part of the galaxy, the female space pirates and their colossal starship Sol Bianca get a surprise when a young girl named Mayo stows away on board the ship. The crew then embarks on a journey to Earth to find the whereabouts of Mayo's parents and discover the secrets of the lost planet.

A girl named Kim chases a group of thieves called the Black Hammer Gang. Until one day the Black Hammer gang and Kim fall on an island inhabited by fairies and it's guardian Michel. The Black Hammer Gang tries to steal the life source of the island called the tree of life. Causing damage to the land and kidnapping the fairies, Michel and Kim have to combat the Black Hammer gang and take back the fairies.

When a meteor crashes to Earth, it briefly changes the climate and dinosaurs once again roam the planet. It's up to a newly formed expedition team to relocate the dinosaurs to a safe environment. (Source: AniDB)