Li Muqing, a genius doctor and member of one of the 21st century's three great hidden clans, dies suddenly from overwork on a dark, stormy night. To her surprise, she transmigrates to an alternate historical era.
In her previous life, the eldest young lady of the Li family, Li Muqing, was gentle, humble, and well-behaved. She thought her life would go smoothly, but on her wedding day, her faithless fiancé broke off their engagement, turning her into a laughingstock across the Longyuan Kingdom. Her usually kind half-sister had her mutilated and left to die, and only at the end did she learn that she had been used...
Li Muqing transmigrates to the very day her engagement is broken off. Reborn, she vows to avenge the woman who shares her name, then turns around and marries the powerful Prince Xuanming, Ye Xiuchen, known as the Living Yama. Using her status as Princess Xuanming, she slaps the villainous woman, tramples her faithless former fiancé, and thrives.
Wait, wasn't she supposed to divorce the prince once she healed his leg? Why is the famously aloof Prince Xuanming climbing into her bed every night?! Is this gentle, tender man really the terrifying Living Yama?!