On the night before her examination, Lin Yanqiu, a low-ranking disciple, finds her life-bound sword mysteriously broken. To her surprise, it awakens as an ancient divine weapon named Yanqiu. The moment the sword awakens, assassins come after her, forcing her into a web of grudges spanning three hundred years.
While fleeing, she meets Xie Linzhou, a Qingyun Sect disciple bearing the same mark. A memoryless sword wielder and a mysterious sword guardian are forced to join hands. Amid the sect's pursuit and ancient secrets, they uncover shocking truths about each other's origins.
