There are 2 people whom Mu Huan Qing does not ever want to meet again – first is the Emperor who messed up her life with his lousy matchmaking skills (he has none to be accurate), and second is the Honorable Duke of Zhen Yuan, who was ordered to marry her (no thanks to the first).
Because of this marriage, he cannot marry his beloved cousin and his sweetheart can only ever be his concubine at best. Although he has no choice over his own wife, he can choose to ignore and disregard the woman he marries, even exile her to live in the countryside.
And despite being abandoned and giving birth to a daughter, Mu Huan Qing is neither discouraged nor afraid. She does not love Fu Yan Lin in the first place and can empathize his dislike of her. Furthermore, his lack of concern gives her the opportunity to live the way she wants so it is actually not too bad a thing.
Faced with these 2 seemingly parallel lines who are contented to stay apart, just how is a meddling demon supposed to get them back together?