The Ling Tian Palace in the martial world is both righteous and evil, with immense power but has long avoided the world. Ten years ago, the young master Ling Xuan (played by Hu Yi Yao) encountered a dying pair of siblings during her travels. She made a ten-year promise with the boy to save the sister, bringing him into the shadow hall of the Ling Tian Palace for training, with the understanding that if he could survive and graduate after ten years, he would come to assist her. After enduring countless life-and-death battles, the boy emerged alive from the shadow hall under the name Ying Shi (played by Lin Ze Hui). However, at that time, Ling Tian Palace was already filled with danger; the old master was willing to disrupt the martial world and even turn against his own daughter to seize the Wan Xin Jue skills belonging to Ling Xuan's mother. Ling Xuan had to disguise herself as a character who was eccentric and ruthless to protect herself while plotting her counterattack. Just at that moment, Ying Shi was assigned by the shadow hall to find the Wan Xin Jue and approached Ling Xuan. From suspicion to testing each other, they went through numerous crises and finally became close confidants who would trust one another. Just as the two began to develop feelings for each other, Ling Xuan discovered Ying Shi's unmentionable secret about his origins...