In the third year of Yongle, a man who had been dead for three years boarded Zheng He's treasure ship. A fragmentary map beneath a bedboard, seven ink dots, and the words "Seek Zheng" sent him toward the old harbor. But corpses on board keep changing, names are being scraped off the register and altered, and old records burn night after night. The deeper he investigates, the more he realizes he's not chasing a person, but a machine, acting on imperial orders to erase everything. Du Heng, a dead man holding the only genuine map in the entire world, decides to reach that door before anyone else.
