For as long as he can remember Natsume Takashi has had the ability to see spirits called Youkai, but learned never to speak about it to anyone. After being bounced around from relative to relative he finally goes back to the village where his grandmother once lived. His grandmother also had the ability to see youkai and when he receives a book called the Yujincho or 'Book of Friends' he finally understands why he can see these spirits. His grandmother collected the spirits, and made them sign contracts and that is what is keeping them close to Natsume. Takashi finally has a purpose, to free the names of the spirits from the book.
With Nyanko, a youkai trapped in the body of a 'Lucky Cat' statue, as his teacher and protector he sets out to empty the book and protect it from those who would take it's power for themselves.
Sorry, no info about the next episode of Natsume Yujin-Cho is available yet.
The TV show is either in vacation or waiting to start their new season. When information about future episodes becomes available, it will be posted here.