The Dayao Dynasty was overthrown, the smoke cleared, the new dynasty was established forever, the world was at peace, and all the people returned home.
But the two teenagers who survived from the ruins never believed in the ending of "fate".
The cold and forbearing young loyal dog official, who carries the blood of the previous dynasty, is dormant in the new dynasty, guarding his shortcomings and calves, and is willing to fight against the whole world for one person; the deep-seated Bai Qihei, the peerless detective, possesses reasoning skills, investigates the world's unsolved cases, is meticulous in mind, has a dark belly, and never shows mercy in his killings.
The two knew each other when they were young, but they were separated for a time, separated in troubled times, and reunited over the years in the turbulent new government. From then on, they were destined to face each other, facing each other tit for tat, and walking side by side.
In this long journey of seeking revenge and finding the truth, he unexpectedly ran into four lifelong fetters.