Modern-day elite Su Jingtang transmigrates into a book and becomes a doomed empress, destined to live only six months before being buried with the old emperor! To defy fate, she uses her modern knowledge to distribute porridge and treat the sick, helping the people. In the process, she meets Crown Prince Murong Che, who has come to provide disaster relief. Three months of fighting side by side make them fall deeply in love.
But disaster strikes at the victory banquet. An imperial decree from the old emperor forces her to become his empress, tearing the lovers apart. Trapped behind palace walls, she is at the mercy of fate. On their wedding night, she drugs the emperor and crosses the line with the crown prince, who has risked everything to come to her. From then on, the two carry on a secret affair deep inside the palace, struggling to survive amid political intrigue and danger.
When the old emperor dies, the sword of sacrificial burial hangs over her head. After Murong Che ascends the throne, he helps her fake her death and escape through an ingenious body-swap scheme, allowing her to return to the palace under a new identity. But the women of the harem continue to scheme against her. Consort Li’s cruelty and deadly assassinations follow one after another... Watch as Su Jingtang plans every move, purges the corrupt, and not only turns her doomed fate around but also helps the new emperor usher in a golden age. Once destined to die as empress, she becomes the one and only moonlight in his heart, and ultimately the mother of the realm.