While Touko and her companions flee the wreckage of their trucks, Koushi digs through the archive for forgotten tomes. What he discovers casts his mission in a new light.

While following secret tunnels toward the palace, Touko and Koushi suddenly find themselves in the middle of the dark forest. They still have a letter to deliver, but the divine clans won't make the journey easy.

Koushi finally reunites with Hinako. They set out for the palace, but their path brings them face to face with the last of the capital's treefolk. Meanwhile, Touko and Akira encounter a familiar face of their own.