Zhai Ling and her younger sister set out to visit a close friend, only to be lured to the “Northern Triangle” and sold to a local criminal syndicate. Both sisters suffer horrific abuse, and their parents are killed trying to save them. Consumed by vengeance, Zhai Ling encounters her ex, Fenghuang, who sees echoes of his own past in hers and takes her on as a disciple. Under his tutelage, Zhai Ling becomes the Northern Triangle’s new female “War Goddess,” annihilating the underworld empire to rescue her sister.