In the late Northern Song Dynasty, Bianjing was about to become prosperous. Su Zhi, the female editor of the Imperial City Department, was caught in the whirlpool of intrigues. When the empire was about to survive or die, she formed an alliance with the sober princess and the retired female sergeant. Three women with very different identities, dealing with the treachery of the court and the war on the battlefield, face a fateful chess game where ideals, protection and ambition are intertwined. When the north wind blows across the earth, they use their wisdom as a blade to find their own path in the broken mountains and rivers, and jointly guard the last spark of civilization in the troubled times.
