Qingping County suddenly received an urgent report of the death of the emperor, but Gu Changan discovered that: the funeral procedures were all true, the messenger who delivered the letter had been dead for three months, and the funeral rites in the city had been prepared before the news of the death arrived. A few days later, the emperor was still in court.
Tracking down a changed word, Gu Changan was gradually involved in a series of chess games involving imperial edicts, reserves, financial power, military power and world reputation. He was also forced to face his father's old crime of changing the imperial edict to save the city twelve years ago, but sacrificing innocent people.
When the emperor really died, no one in the world dared to believe him. Faced with four checks and balances of legitimacy, Gu Changan must find the answer: Who is qualified to determine the truth for the world? How to make every move leave the name of the chess player?
