Pei Su, the legitimate heir of the Pei family of Great Jin, bears an ancient immortal's seal hidden within him. A twenty-year-old palace mystery resurfaces, and he resolutely leaves the imperial capital, traveling through Bingzhou and Luodu while laying plans at every turn to uncover the truth. Along the way, he repeatedly clashes with the northern heir who rules his own territory and remnants of the former dynasty who have lain low for years, as rival factions take turns surrounding him and engaging in power struggles. Court intrigues and political battles unfold alongside rumors of hidden secrets in the martial world. Lost ancient arts and imperial treasures emerge, driving everyone into a frenzy of competition. The confrontation between northern and southern forces grows ever fiercer, and an earth-shaking upheaval that will stir the four seas and sweep across the realm quietly begins.