Synopsis

Junyoung strikes a deal to acquire twenty low-quality Down Gems in exchange for double payment and participation in a secret mission related to a unique labyrinth. Meanwhile, a group prepares an expedition to the Abyss, utilizing radio and rat scouts, discovering that the rats within the Naga Labyrinth are organized, intelligent and even hold a reverence for the labyrinth's owner. These rats, led by a young rat named Tretch, are dealing with their own rebellion, and also offer aid and intel regarding the Abyss.