Riko and Reg manage to descend deep down into the first layer of the Abyss. Reg then remembers that Jirou slipped a letter into his backpack and reads it. The letter contains a copy of vital information about the Abyss, as well as a note from Jirou warning the two that he will pursue them at dawn. Riko concludes that Jirou is testing them, and if they can reach the second layer without getting caught, he will stop chasing them. The two continue down to the second layer when they are intercepted by Habo. He tells them that Nat and Shiggy requested that he escort the two of them to the Seeker Camp in the second layer. While grateful, Riko declines Habo's help since she and Reg want to reach the second layer on their own. Habo informs them that the guardian of the Seeker Camp is Ozen the Immovable, a White Whistle who helped Lyza transport the infant Riko to the surface. He also warns the two to be wary of Ozen before saying his farewells. Riko and Reg then reach the second layer, the Forest of Temptation.