Eizo succeeded in creating a magic stone and cured the fairies' illnesses.
While he and his colleagues were busy digging a well in preparation for the coming summer, a tree spirit, a dryad, who claimed to be the master of the Black Forest, came to visit Eizo.
A spirit who came to the Black Forest claiming that the Eizo family is the most powerful force and asks them to defeat a powerful monster.
It is said that if left unattended, a large number of monsters may appear.
For the sake of the forest he lives in, Eizo decides to go with his family to subdue monsters…?