Zhou Xu, a history student, opened the history books and became the person whose name was not left in the official history.
Every time he enters history, he has to replace an unknown person who has been erased: delivering a fatal secret letter to the emperor, choosing a side on the eve of a palace coup, changing a sentence of historical data that is enough to kill someone between a lonely city and thousands of troops.
Official history is a rule that must happen, unofficial history is a false path that tempts one to death, and the blank space left unwritten in history books is his only way to survive.
The hero entrusts him with life and death, and the hero invites him to conspire with the world. Those stunning women who were written down as legends by later generations also took the initiative to hold his hand on the most dangerous night in history.
But every time history turns a page, all the ancients will forget his name and face. Only the love debts he caused, the people he saved and the world he changed still exist.
Until modern times, cultural relics that should not exist continue to appear, with the same sentence repeatedly written on them:
"I don't remember who you are, but I know that I once loved an unknown person."
And Zhou Xu gradually discovered that what he was entering might not be the past, but a history that had been repeatedly tampered with.
