Yan Xizhao came to Lingnan with her elder brother and parents for sightseeing when she was young, but her parents died in an accident. When she and her brother Yan Tianyao were at a loss, they met Mo Yinxing, the owner of Yimu Tower in Lingnan.
The brother and sister who thought they could return to their hometown have become the saint and the owner of the second floor of Yimu Tower... Xizhao is unable to see the light of day because of her status as a saint, and is "justified" imprisoned in a dark room all day long. However, she is a blessing in disguise, practicing the peerless swordsmanship according to the sword manual left by her mother and the sword Biyu.
Xizhao was so lonely that she tried every means to escape from Mo Yinxing's control, and met her scourge Luo Qiongyu...
The world of Xizhao has become colorful. How will the story between her and Qiongyu develop? What kind of fateful entanglement does Mo Yinxing have with Xizhao's parents?
The grievances, love and hatred in the world, in the end, there is only a sunset sky left.