During the hundred years of the Yin Dynasty, every imperial edict related to the fate of the country had two versions: "gold" and "stone". The golden edict was issued to the world, and the stone edict was hidden in the secret treasury. This was the remedy planned by the late emperor, and it was also a silent thunder hanging over the head of the dynasty.
In the fourteenth year of Jinghe's reign, Shen Yan, an unknown minor official in the Privy Council, discovered a triggered "Abandoned Stone Reserve Edict" in a pile of old papers. The prince, who was supposed to be deposed because of this edict, seemed to have expected it, and instead used the power of thunder to cleanse the court. His boss died violently and his colleagues disappeared. Shen Yan suddenly became the only pawn in this silent secret war who knew the rules but had nowhere to escape.
In order to protect himself, he was forced to step into the deepest shadow of the empire: to investigate the secret treasury of stone edicts scattered in all directions, and to deal with the elders who wanted to maintain the ancestral system and the East Palace who longed for absolute power. In this game of chess with the entire empire as the chessboard and centuries-old edicts as the chess pieces, Shen Yan gradually discovered that what he held in his hand might be the last key that could end both the chess game and the players at the same time.