Bu Yun, the gatekeeper of the oasis city-state "Xingluo", is regarded as a tool by the city lord who covets power because he possesses a bloodline that can purify radiation. During an "ancient road exploration" that she was forced to participate in, she encountered Kong Yan, the leader of Shadow Stream. The two people were supposed to be enemies, but in their life-and-death struggle, they discovered that the tokens of the old world in each other's bodies had the same origin. In order to uncover the secrets of blood and ancient roads, they formed a fragile alliance, traveled through the scorched earth and ruins of the radiation zone, and fought against the city-state's pursuers and shadow stream ghosts. When the truth pointed to the collapse of the world three hundred years ago and the bond between the two people's ancestors, Bu Yun understood that in this broken mountain and river, Kong Yan's step by step was never to take advantage, but to give her a preference that he would protect with his life.
