Following Hanna's disappearance in the underground river, the community become increasingly antagonistic towards Ango for his behaviour. When Ango pulls a knife on the others, Takahiro Aramaki throws a rock at his hand to disarm him and injures the hand. Ango decides to leave and Ryo accompanies him. The others then create a new dry season camp near the watercourse to avoid carrying water back to their base camp. Takahiro decides to leave and search for Hanna whom he believes is still alive, and Ayu joins him...