After Wu Xie returned to Hangzhou from Nansha after two adventures, he suddenly received a call from his childhood friend Lao Yang during his recuperation. Lao Yang told Wu Xie about his adventure in the hinterland of Qinling Mountains three years ago and invited Wu Xie to go on an adventure together to explore the ancient ruins. Wu Xie and Lao Yang set out to explore the Qinling Mountains, where they saw huge Taimen salmon, magnificent underground river waterfalls, incredible ancient sacred trees... and Zhang Qiling, who had been elusive, was secretly helping Wu Xie.