Su Taoying transmigrates into a book and becomes the unpopular second young lady of the Su family. Controlled by a system, she is forced to pursue the First Prince, Xiao Yuchen. After chasing him for more than three years, just as she is preparing to make her final confession, the system informs her that she has pursued the wrong person. The one she is supposed to win over is He Lanshan, the Great Xing Dynasty's mighty General Who Guards the Nation. To save her own life, Su Taoying forcibly kisses He Lanshan, setting her on the path of pursuing him instead. As the two face various obstacles together and become entangled in a rebellion conspiracy orchestrated by Xiao Yuchen, they save the imperial court from crisis and gradually fall in love with each other. Su Taoying completes her conquest mission and saves her life, while He Lanshan finally wins the heart of his beloved.