"Since we are all living in a drama, why not be each other's audience."
Tang Wanrou is the most unpopular concubine in the Prime Minister's Palace. Her biological mother died young and she is walking on thin ice in the deep house. She is proficient in medical skills and has a cold temperament. She originally thought she would live in loneliness for the rest of her life, but due to an imperial edict, she was forced to marry Zhao Heng, the ninth prince who was rumored to be absurd, extravagant and extremely sick.
Zhao Heng was the ninth prince of the current dynasty. His biological mother was from a humble background, and he had been looked down upon in the palace since he was a child. In order to protect himself, he disguised himself as a playboy who wandered around the flowers. Using his "sickness" as a shield, he endured and lay dormant in the bloody storm of seizing his legitimate son.
A substitute marriage tied the fate of two "abandoned children".
On their wedding night, he treated her coldly: "If you marry into Prince Ning's palace, you are destined to lose stability."
She responded calmly: "I don't ask for favors, I just want to treat His Highness with respect as a guest."
On the surface, they are a sickly prince and a docile princess, but secretly they are allies who each get what they need. She took care of his body and dealt with the powerful people in the harem; he provided her with shelter and protected her.
However, as they protected each other through life and death, the relationship that began with utilization gradually gave birth to a deep love that cannot be let go. When the battle for the right to inherit the throne intensifies, Zhao Heng's disguise is revealed layer by layer, and the mystery of Tang Wanrou's life experience also emerges...
When the chess pieces decide not to accept their fate, can this marriage that started as a substitute have a real ending?