Natsume Takashi has the ability to see spirits, which he has long kept secret; he inherits a strange book that belonged to his deceased grandmother.

Natsume hears the voice of a child.

Natsume finds out what Kai really is.

Natsume finds a yokai named Kagejawan.

Natsume is accosted by a spirit who asks for her brother's name back; she says that both of them have come from the village of floating spring, a paradise sealed off from the land of men.