Reg goes on his first cave raid! Meanwhile, Riko makes preparations to go into the abyss to find her mother.

Reg and Riko continue their descent after they leave Ozen's Seeker Camp. Riko's mettle is tested as Reg passes out and she has to fend for herself.

Nanachi sends Reg on a mission to find certain items that could possibly save Riko. Meanwhile, Nanachi reveals a little more about themself.

The village’s membrane has been breached, and through the gap floods chaos itself. But as attackers enter from without, aid comes from within.