Yun Qinglan is the descendant of Fengming Valley. Originally intending to go down the mountain to call off an engagement, she unexpectedly saves Xiao Yan, the president of the Xiao family, and discovers that he is precisely her fiancé. To deal with the internal and external troubles of the company and the trouble brought by the Meng and Yan families, she stays by Xiao Yan's side in the identities of bodyguard and fiancée, resolving crises with her combat skills, medical skills, and wisdom. During their time together, the two gradually develop trust and affection from a transactional partnership.