Yong Xuan falls into an accident when someone secretly plants two silver needs in his saddle, startling the pony he is riding. Yong Qi is blamed since he was teaching and guiding Yong Xuan when he fell off his pony. The Emperor mandates Ling Yun Che to investigate, but Ling Yun Che, along with Li Yun, decides to rule the matter in an accident so that the Empress and Yong Qi aren’t blamed. Ling Yun Che’s wife overhears his conversation about this with his friend. (Source: frankly at MyDramaList)