The Duchess mistakes the young man in Jiang Xin Bai's closet is her son's lover and orders him to find Yan Nan Xing. Jiang Xin Bai finds out Lu Bo An is the person who handled the calligraphy and painting but has no evidence to directly interrogate him. Yan Nan Xing decides to use his new identity to sneak into Hanlin Academy to help find evidence. (Source: Chinese = Baidu || Translation = AnastasiaWun at MyDramaList)