Modern girl Liu Yunxi deeply loves the ninth prince Xie Yuheng from a historical romance novel. Crying until early morning over his framed and decreed death ending, she wakes up after falling asleep to find herself transmigrated into the same-named cannon fodder legitimate eldest daughter in the book. The original owner was weak and mediocre, but she is clear-headed and decisive—cleaning up the inner household and protecting family and friends. With foresight of the plot, she moves step by step, vowing not only to save her beloved, but also along the way rewriting the tragic fates of good people like her younger sister and best friend. From their initial encounter at the archery banquet to sharing hardships amidst court turmoil, she breaks through deadlocks with her resourcefulness while he reciprocates with deep affection, and the two join forces to confront the treacherous chancellor, ultimately turning tragedy into a good match.