In the extreme north, there is no one inhabited. In the snow field that has been silent for thousands of years, the ice layer collapsed, and a prehistoric Great Wall reappeared in the world, attracting expedition teams to go.... I am the only one left. Dawn In this city, a young man named Lu Feng'er heard this distant call. I don't know if it was driven by fate. He followed the call and went to the extreme north to solve this mystery. Under the Great Wall, between the shrines, there is a dry well A thousand-year-old secret is hidden. Six thousand years ago, she suddenly looked back... Six thousand years later, he...