Yelu Yan, a Khitan descendant, was reborn as a down-and-out scholar in Bianjing in the Northern Song Dynasty. He was accidentally bound to the "Longitude and Latitude System" and struggled to survive between the court and the market with modern knowledge; Wan Yanfeng, a Jurchen descendant, returned to the deep valleys of the Qinling Mountains and turned into a frail phoenix chick. Selected by the "Nirvana System", he breathed spiritual energy in the mountains and fields, and gradually unlocked the magical powers of the divine bird.
One is surviving step by step in the machinations of the human world, while the other is growing up in nirvana within the laws of nature. The two people, who were originally on different paths, forged a bond across species due to an unexpected encounter in the mountains and forests. When the iron hoof of Liao and Jin looms closer, when the prosperity of the Song Dynasty lurks in crisis, the paths guided by the two systems gradually intersect - should we just go with the flow, or use our meager strength to leverage history? The twins of man and bird will eventually stir up an unknown storm in the misty Song Dynasty.
