As the library continues to explain the history of the world, a danger looms in the background.

Satoru is getting tired and his power is waning and the Earth Spider Colony army is much larger than expected. When all seems lost, help comes from an ally that could be much more dangerous.

Saki and friends are looking for Shun but hit road blocks everywhere they turn. After dinner, Saki remembers a name from the past and Maria flies in with some big news.

While searching for Maria and Mamoru, Saki and Satoru meet their old friend Squealer. He invites them to the new Robber Fly colony where things have changed greatly, but where is the Queen?

Many years have passed; Saki and Satoru have grown and moved their separate ways. But recent actions within the monster rat community have brought them back together.

Many events act as catalysts in an impending war.

As Niimi stays behind to fulfill Tomiko’s last order, Saki and Sataru head toward the Temple of Purification. When they get there they learn the true extent of Yakomaru’s true plan.