(from ebookjapan):

Sasuke, the son of a farmer and his wife, disappears while his parents are away from him. The villagers' desperate search is in vain, and Sasuke is never found.

As the days went by, a pack of wolves attacked the village far from here. Tomekichi, a hunter who set foot in the mountains to hunt for the main wolf, was attacked not by wolves but by a boy...!