Modern-day medical student Wen Ning transmigrates to ancient times, only to find herself as a concubine, a position near the very bottom of society. To make matters worse, she inexplicably becomes caught up in a deadly situation that threatens her life.

After escaping the fatal trap, Wen Ning plans to use her medical skills to free herself from her status as a concubine and build a successful life on her own. However, her plans take an unexpected turn when her supposed husband begins taking an interest in her…

Wen Ning makes it clear that she can treat his illness, but only under three conditions:
First, he must grant her freedom.
Second, she will choose her own marriage partner.
Third…

Husband: “Why don’t you just become my legitimate wife instead?”