Ning Ning, Princess Qingyuan of the Lichao Kingdom, was born beneath auspicious signs and cherished like a treasure by her father, the emperor.
Her life was bright, and she loved all the world's colors. Ignorant of its cruelty, she repeatedly came to the aid of Yin Junlin, a hostage prince who was humiliated at court.
But her kindness brought disaster upon her kingdom.
At seventeen, Yin Junlin secretly left Lichao, took command of Nanxun's iron cavalry, swept through three kingdoms, and marched on Lichao's capital.
At the time, Ning Ning was marrying the young marquis Jiang Cheng. Her homeland was shattered, and Lichao fell. She was taken to Nanxun and confined in the enemy kingdom's imperial palace. The warmth they had once shared turned into an unbridgeable gulf. She had feelings for Jiang Cheng, while becoming entangled in a love-hate relationship with the ruthless Yin Junlin. In the end, all that remained was devastation.
Reborn, Ning Ning returns to the time when Yin Junlin is sixteen.
In this life, she knows he will become a tyrant who slaughters her family and destroys her homeland. All she wants is to eliminate this threat.
But faced with the innocent, still-naive boy before her, she steels herself again and again, only to find she cannot bring herself to strike.
To her surprise, the poison she secretly prepared also causes Yin Junlin to be reborn.
He sees through all the grudges of their previous life. Outwardly, he is gentle and obedient; in secret, he plots at every turn.
As soon as he regains control of Nanxun, he rushes to Lichao and forcefully asks Ning Ning to marry him, terrified that history will repeat itself and she will fall for someone else again.
A political marriage neither can escape binds them together once more.
Within their cage, they love and torment each other, burdened by old grudges and beset by misunderstandings.
How can the blood feud of their previous life and the tender affection of this one ever be resolved?
