Under the bustling appearance of the modern city, there is a hidden family that has been passed down for thousands of years - the Long Yulin family. This mysterious family, which controls the lifeline of the global economy and has close friendship with political figures from various countries, takes "Iron-blooded tenderness, dragon rules the world" as its family motto, and guards the world order at the intersection of darkness and light. The male protagonist Lin Yan, as the sole heir of the family, was sent to Jiangbei for five years since he was a child to practice for five years. He lurked as a "little doctor", but in the bloody storms, he created the legend of "the evil god of the underground world".
