The burn mark on the ancient book shattered the modern light. When Jiang Wan knelt outside the ICU and signed a life-for-life contract, she thought it was the only way to save her sister. Little did she know that the moment she traveled to Dajing, she had fallen into an even colder cage - her sister's breathing was tied to her "emotional value", her heartbeat was the medicine to prolong her life, and her heartache was the knife to kill her. If she died, her sister would also die at the same time.
She is a marriage princess sent by an enemy country, but she is actually an abandoned child of her family. She has the bloodline key to the dynasty's secret treasure hidden in her body. He is the cold-faced regent Lu Yunhan, who bears the blood feud of his family. He is all calculated to treat her tenderness, but he loses his heart while taking advantage of her. When the warmth in the soup, the ambergris on the cloak, and the hosta in the market all became a knife piercing her heart; when "I protect you" became "my chess piece cannot die", and "salvation" became a forced palace of "handing over the key", then she understood: Love in this troubled world has always been about drinking poison to quench thirst.
If every heartbeat is depleting herself, and every tender word is a fatal scam, how can she protect her sister's life and her own heart in the gap between love and hate? And when the truth is revealed and her enemies become comrades, what should she do to get a place where she won't be let down?
