The Spiritual Heaven Sect, an influential group, has been secluded for years. Ten years ago, Young Lady Ling Xuan saved a dying pair of siblings and took the brother, Ying Shi, into the Shadow Pavilion for training. If he survived, he would become her assistant. Now, the sect is vulnerable as Ling Xuan’s father seeks the Wanxin Technique, causing chaos and turning against her. Disguised as a ruthless fool, Ling Xuan must protect herself. Ying Shi is sent to find the Wanxin Technique, but through their journey of suspicion and danger, they build trust and fall for each other. Just then, Ling Xuan uncovers the secret of Ying Shi's birth.