Twenty years after the mysterious murder of Bai Tianyu, leader of the Divine Knife sect, in the border town of Plum Nunnery, Fu Hongxue returns from the western regions to uncover the truth about his adopted father’s death. Meanwhile, Bai Tianyu’s biological son, Ye Kai, also arrives at the border town, seeking answers. As hidden truths surface, they find themselves entangled in a web of betrayal, secrets, and unexpected alliances, leading to a dramatic confrontation.