Empires have collapsed in the world, and territories are scattered like quicksand in silent places in the annals of history. Yun Heng was born in a corner, grew up in ruins, and carries the last star map of the late dynasty. Not to revive the old country, not to compete in the Central Plains, Yun Heng just wants to trace the truth behind the empire's collapse. Among the ruins of the deserted city and the ruins of the secret palace, he interpreted the profound meaning of the lost civilization with his calmness and tenacity. The survivors of the empire, profit-seeking merchants, reclusive scholars and ambitious heroes are all entangled in their paths because of the star map. What Yunheng faces is not only the mists of history, but also the subtleties of the human heart and the shackles of fate. When past glories and sins reappear in the dust, he must make a choice: let the truth sink into oblivion, or let it illuminate a new future? This book uses calm writing to outline an epic echo about memory, faith and redemption.