Fifteen years ago, Concubine Lan (the mother of King Luo) and her son were framed by an adulterer and the family was exiled. With the help of her parents, Concubine Lan fled to the south of the Yangtze River and became anonymous. She was protected by Yan Zhuqing's parents. They met that year when Yan Zhuqing was five years old and Murong Xuan was eight years old. Five years later, Concubine Lan was rehabilitated and returned to the palace. Just when everyone thought that Yan Mansion would be favored, a murder and a fire destroyed everything overnight, and Yan Zhuqing was rescued by Ye Peixuan who arrived, but Ye Peixuan arrived too late and could not save the Yan Mansion family. Yan Zhuqing witnessed the entire process of his parents' murder and lost his memory. Ye Peixuan was worried that the perpetrators would find Yan Zhuqing's body missing, so he set everything on fire. When Murong Xuan learned about this, he felt strange. He endured the pain in his heart and investigated in secret. The story begins fifteen years later.