In the sixth year of the great cause, Emperor Yang of the Sui Dynasty's grandiose and great undertakings were like a raging fire cooking oil, but beneath it, people's livelihood was difficult and undercurrents were surging. The war in the north and the canal in the south drained the last vestiges of the empire's vitality. Li Chen, a young man from a northern border county, and his young sister struggled to survive in troubled times and headed south. All he wanted was a place to stay and three meals a day to eat. However, the torrent of time will not let go of any grain of sand. From the struggle at the ferry, to the beacon smoke in Wagang, to the mist and rain in Jiangnan, he was gradually involved in the whirlpool of history. When former partners become enemies on the battlefield, when personal grudges intertwine with the world's chess game, how should Li Chen make a choice? This is not only the long song of a person, but also the elegy of an empire.
