One sunny afternoon, an unknown uncle who had eaten and drank enough to go out for a walk, and a reckless girl chasing a fat cat, reached some kind of mysterious agreement because of a gem as big as a pigeon egg, and then the two embarked on a journey called home. The journey is very long, so long that they will spend countless time and participate in many stories. The journey is very short, so short that some people's life is just a moment.