With everyone else dead, Bayi, Shirley, Kaixuan, Golden Tooth, and Bold Ma escape from the Lost Caverns, the Dragon Book in their hands. With help from Blind Chen, the Trio trace Mu Chen Gem to the Worm Valley in Yunnan.
What's left of the gang struggle with the endless mysteries in the Lost Caverns, including a gigantic spider, a fountain of eternity, an intricate coffin that seems out of place, and a game of Go that seems too easy.