Hidden in the red sand desert is the secret technique of "Fire Binding", which can seal a person's power in the sand. The girl Yansha is the only fire binder in the desert. Her blood can awaken the power of Red Sand, but it will also burn her own life. When the army outside the desert broke through Shacheng, and when the city lord forced her to use the secret technique at the cost of the lives of all the people in the city, Yansha finally understood that binding fire is not a protection, but a sacrifice. She grabbed a handful of red sand and lit herself in the ruins of the sand city, hoping that the fire-bound secret would be buried in the red sand desert together with the army.
