In the Dayou Dynasty, to rescue Heir Chu Huaichen, who was bewitched by the green tea Gu Zhiwei, the Princess of Chu spent a fortune to invite Gu Qingli—a madwoman imprisoned by the Gu family in the ascetic nunnery—and forged her identity as Xie Nianxi, arranging for her to become the prospective heir's wife. Gu Qingli appears gentle and weak on the surface, but is actually plotting step by step, using top-tier skills to repeatedly expose Gu Zhiwei's vicious schemes, causing the heir to gradually fall for her. However, her sole purpose is to complete the mission in exchange for her freedom. In the end, Gu Zhiwei's crimes are exposed and she is thrown into prison, and the Gu family is ruined. Gu Qingli successfully achieves her goal, declines the position of heir's wife, and resolutely sets off for the Western Regions to study, determined to live out a brilliant life of her own.