This world creates itself full with pairings. If there is light, there will be dark. If there is night, there will be day. If there is mortal, there will be immortal. If there is black, there will be white. If there is male, there will be female. If there is sugar, there will be salt. And if there is visible creatures, there will be invisible creatures.

That is how Cloud Nine is created. A world where all invisible creatures live in. Creatures which human can't see and think they don't even exist. In fact, all those creatures they're imagining are very much alive. In The Cloud Nine. They just can not see it themselves. They are all invisible and immortal.

When human think that the only creatures alive are their kind, animal and plant. The existance of Cloud Nine will bring them the shock of decade. Elita, Tempus and Terra definitely will not let it happened. But, sometimes things don't happen according to their plan, do they?