In the era of "Great Silence", the "Star Torch", the technological heritage of the old world, is the last guide for mankind. When the star torch suddenly went out, the world fell into chaos and panic. Cai Yue, a voyager with a mysterious past, and Murong Yan, a leader who believes in "freedom comes at a price", are forced to join forces. They will face Han Buhui, an imperial officer who believes in order, and Song Wanqing, a girl who can shake the foundation of everything with pure questions. On the journey to find a new direction, there will be the most intense collision between technology and people's hearts, order and freedom, ideals and reality.