Rigel, an eight years old boy, lives in a simple family. He's a smart kid, although sometimes a bit clumsy. However, he is not a completely human child. There is something hidden inside him. It all started when Rigel was playing happily in the warm sunshine, until a strange event changed his whole life. Beyond the mysterious forest, Rigel discovered a fantastic planet, the likes of which no one had ever imagined.

However, the presence of evil monsters threatens the life of the planet. Time is almost up. Rigel must fight monsters to protect the planet. He needed some friends to help him, but what kind of friends? Can Rigel save the mysterious planet?