The mysterious female protagonist, Yang Ji, meticulously plans and successfully seduces the father of the male protagonist, Yin Jiyun, becoming his stepmother in name. On the surface, she appears to be seeking glory and wealth, but her true motive is to avenge the extermination of her family by the Yin family ten years ago. Yin Jiyun suspects Yang Ji has ulterior motives, yet almost gets his own secret of being the fake son of the Yin family exposed by her! Both, wearing false identities, decide not to expose each other, but a series of events lead them to develop a fate-like affection for each other, gradually realizing that the other might be a person from their past returning.
