On the very first day of his investigation, a Jinyiwei officer falls into insanity. His faithful deputy, lost in the shifting dunes, spirals ever deeper into a struggle between desire and loyalty. Meanwhile, a woman once marked for death—her entire family slaughtered, her body now immune to all poisons—returns to the desert. She willingly places herself at the heart of a brewing storm, making herself the prize in a deadly contest fueled by revenge.