Agent Yang Xi accidentally travels through time to the Dongli Kingdom and becomes Yang Jianwu, the daughter of the great general who guards the nation. Born with a scientific research space, she possesses medical skills, the art of Qimen Dunjia, and combat abilities. On the surface, she appears ordinary in both talent and beauty, but in truth, she is meticulous and secretly builds her own power. Seeing through the schemes of imperial authority, she refuses to become a pawn in court politics. Leaving the capital behind, she settles in Anshun, opens shops, trains subordinates, and establishes the mysterious Cloud City. Amid the chaos of a troubled age, she uses her abilities to navigate political intrigues and conflicts involving the nation and its people, protect her loved ones, study formations and medicine, and forge an extraordinary path of her own.