Gu Jin and Yin finally enter Mount Ziyue but fail to find any trace of Hong Yi. Instead, they unexpectedly learn about a sycamore tree in the Nine Abyss Purgatory sealed in Mount Ziyue! Disregarding objections from Bi Bo, Gu Jin, with the assistance of the Tissot Coat provided by the Three-Fire Dragon Lord, secretly enters the Nine Abyss Purgatory along with Yin.