Hei Yanjing learns that the team is in danger and immediately comes to their rescue. However, he discovers that in the underground palace of Nanyue deep beneath the mountain seam is Nagas, a huge monster regarded as an ancient god. The team is strangely lured by the "call of the ancient god" to continue their journey deep into the lair. In their struggle to survive the most extreme situations, the secrets of the gods are also gradually revealed.