Xiao Yichen, the king of Dayongchen, is good at fighting for his high position, and Yun Jia is good at forging weapons and making mechanisms. The foreign enemies were calmed down, but the royal family and the aristocratic families were jealous of their plans. King Chen was seriously injured, and the Yun family was destroyed. While King Chen was recovering from his injuries, he accidentally met Yun Ranran, the legitimate daughter of the Yun family whose legs were destroyed. King Chen fell in love with her at a young age and took advantage of the opportunity to ask for her hand in marriage. When the two get along, Yun Ranran is also attracted to her, but she shrinks back because of her identity. The misunderstanding was finally resolved and Yun Ranran cured her leg. Together, the two of them fight against the royal family's plans, let the truth come to light, and settle old scores.
