Human awaken the ancient race, the Phytozen (like tree nymph). The Phytozen found out their homeland no longer exists, even it been pollution by the human. Then the war between human and Phytozen continues for many years. Until now, forest have been forgotten by human and no one sees a Phytozen anymore. One day, a human boy called Uto lost in the forest and meet a little Phytozen called Oak. Uto helps Oak to get home.