In the Dasheng Dynasty, there are turbulent undercurrents under the surface of peace.
Shen Qingci, the direct daughter of the Grand Tutor, appears to be the most beautiful woman in the capital who is proficient in music, chess, calligraphy and painting, but secretly she is a rebel with both medicine and poison. She thought that her whole life would be wandering among the rules of the deep house and the palace, until two men tore her world apart.
Xiao Yu, the young emperor, is clear and kind but trapped in the whirlpool of power and intrigue. He first met the girl who was treating refugees in a Buddhist temple, and was attracted by the light in her eyes. His love was restrained and deep, and he was willing to take the country as his employer, but he had to hurt her again and again for the imperial power.
Xiao Jue, His Highness Prince Jing, whose parents died unjustly under the imperial authority, has only the fire of revenge in his heart. He discovered that the emperor's brother fell in love with that special woman, so he carefully set up a plan - first to take her body, then to take her heart, and finally to take away everything from the emperor's brother. But in the plunder, he burned himself to death.
From a violent possession that started with plunder, to a gentle sinking that started with surprise; from the harem to the front court, from the secret room to the dragon bed... Shen Qingci was torn between two extremes. There is also a secret guard, Han Jing, who always stands in the shadows. He suppresses his obsession with her until he goes crazy, and finally wields a knife to the emperor who is loyal to him.
When neither medicine nor poison can cure the dynasty's stubborn illness, when love and hate become sword blades stabbing each other. She chose to use the most brutal way to become the "medicine" that ended this disaster.
This is the obsession of three people, the empire of two people, and the nirvana of one person.