The heroine (Shen Qingge/Lin Wan) is the real eldest daughter of the Duke of Guo. When she was young, she was transferred and raised as a peasant girl "Lin Wan" due to internal fighting in the family. She has superb martial arts (learned from a reclusive master) and special abilities (such as photographic memory/proficient in mechanisms). In order to find out his life experience and the cause of his biological mother's death, he married the sick prince instead of his fake daughter (Shen Qingwan) who had escaped from marriage. Calm and rational, with maximum force value.
Chu Heng was the seventh prince in the dynasty and was named "King Yi". On the surface, he appears to be frail and indifferent to fame and wealth, but in fact, he is a hidden and sinister BOSS who controls a huge intelligence network. There is a "White Moonlight" savior in my heart who I have been looking for for many years (the true heroine in my childhood). Marrying "Shen Qingwan" is to paralyze her opponents.
The heroine wears a false identity and has to imitate the pampered "Shen Qingwan" without revealing her secrets, while also conducting secret investigations. The male protagonist suspected that the bride had a different identity from the beginning, and quietly observed the test.
As the male protagonist gets along, he gradually discovers something familiar about the female protagonist (little habits, martial arts skills), and suspects that she is the person he is looking for. The heroine has no knowledge (or has a vague memory) of the hero's "White Moonlight" story, leading to a jealous misunderstanding.
The heroine is struggling between playing "Shen Qingwan" and being "Lin Wan", longing to regain her true identity. Does the hero love the real her in front of him, or the phantom in his memory?
There is a bigger conspiracy behind the fake daughter's escape from marriage (such as enemy spies, a fight for the legitimate daughter), and the mystery of the heroine's life experience is also involved.