Ép. 2: Le trio explore une couche de désert dangereuse et traque un voleur qui a dérobé la Sifflet Blanc de Riko.

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Fascinated by the sixth layer, Riko, Reg, and Nanachi do some exploring and find that the layer has a hot, desert-like environment littered with numerous ruins, and is also populated by extremely dangerous wildlife. Wanting to let Nat and the others know she's okay, Riko attempts sending another mail balloon to the surface, but it is quickly intercepted by flying wildlife. All the while, the trio are quietly observed by a mysterious being. The next day, Riko wakes up to find that her White Whistle has been stolen. Nanachi discovers clues left behind by the thief, who was able to recover the mail balloon, and snuck into their camp without alerting any of them. Reg picks up the scent of the thief and the follow it until they reach a large structure with a single entrance. With no other leads, the trio enter the structure, whose entrance is protected by a force field that repels the Curse. The mysterious being continues to watch them. Inside the structure, the trio find a village populated by what are apparently Hollows. One of them, Majikaja, greets the trio and agrees to take them to Riko's White Whistle. (Source: Wikipedia)