With the only tunnel to the village sealed off, Akira and the others decide to cut through the forest and cross the mountain; along the way, they run into a man named Kumano, who is constructing a treehouse in the forest.

Together with the villagers and the people who escaped from Tokyo, Akira and his friends help each other out while enjoying a brief moment of happiness; Meanwhile, Higurashi has been preparing to take his revenge on society.

Akira and his friends split up to save the villagers from the massive swarm of zombies; but zombies aren't their only concern as Higurashi and his gang stand in their way; Teruo manages to stop the zombies by himself, but he is captured by Higurashi.