Modern designer Su Wan accidentally traveled through time and became the sickly legitimate daughter of the general's palace. The original owner was depressed and fell ill because her parents forced her to marry her to an unloved prince. She is bound to the "Marriage Book" system, and needs to earn marriage points by completing well-intentioned tasks (such as helping maids talk about marriage, resolving conflicts in the market), and redeem them through draws for small items such as "Yujiehua" (to soothe emotions), "Qiaoyan Dan" (to resolve embarrassment) and other small items. In order to get rid of her parents' control, she accidentally got involved in the mission of the secret guard organization "Shadow", and had many confrontations with the cold-faced killer Xie Yan. The two went from mutual testing to mutual secret love, but because of Xie Yan's secret identity as a "remnant of regicide" and Su's father's plan to "clean up the Jianghu forces", they fell into a sadomasochistic relationship of "good vs. Evil" - Su Wan pretended to be crazy and resisted the marriage to protect Xie Yan, while Xie Yan was willing to expose her weakness to protect Su Wan. Finally, with the help of the system, she exposed her parents' plan to "consolidate power through marriage" and joined hands to break the shackles of fate.
