Lin Che, a PhD in materials science and finance, dies suddenly at the airport and wakes up as Crown Prince Zhu Biao on the ninth day of the eighth month in the fifteenth year of Hongwu. He retains every bit of the original owner's twenty-seven years of memories, and the histories record the ending just as clearly: his mother will die in sixteen days, he will die in ten years, and seventeen years from now his fourth uncle will raise an army. The blood of loyal ministers will pile up layer upon layer. He has no System, no status panel. He has only two things: a head full of knowledge about money and materials, and a ledger no one dares to open. So he stops the medicine bowl in Kunning Palace, exposes the Imperial Medical Academy's falsified pulse records from the past ninety days in open court, puts up the Ming's first official price list outside the gates of Yingtian Prefecture, and forces the hand that altered the accounts in the Imperial Treasury into the light with a sheet of graph paper. Saving his mother is only the first item in the ledger. Next come paper currency, military arms, salt and iron, and the vassal princes. He rewrites the Ming's rotten accounts, page by page, until one day Ming ships sail out to sea and the Ming flag flies over every ocean. History has already written the ending. He is determined to rewrite it, stroke by stroke, for the whole world to see.