In the past, the descendant of the Spiritual Beast Immortal Sect was summoned to the plane of mountains and seas for thousands of years. When he returned, his sect was destroyed and he was in a coffin. Relying on the "Book of Mountains and Seas" that returned with him, he summoned the ancient beasts, rebuilt the mountain gate on the ruins, uncovered a thousand-year conspiracy, and finally made the name of the mountains and seas suppress the heavens again.
