Liu Xiangyu was born the daughter of a marquis, the Empress Dowager's niece, and raised in luxury. She and the Crown Prince were in love with each other.
As the political situation changed, the Crown Prince married another woman as his Crown Princess, and her father used her as a bargaining chip in a political marriage, marrying her off to Prince Rui.
Later, Prince Rui fell from power, and Marquis Le'an was left without support. To win the Crown Prince over, he turned around and sent Liu Xiangyu to the Crown Prince's bedchamber.
Liu Xiangyu thought that since she and the Crown Prince loved each other, they would be a devoted couple even if she could not be his principal wife. But the Crown Prince gave her no title. Though he visited her often, he never touched her.
She thought he despised her because she had once married another man.
Then one night, the Crown Prince quietly slipped into her room. He held her close, whispering tenderly in her ear again and again that he loved her.
Only then did Liu Xiangyu understand that he had avoided touching her not out of disgust, but to protect her.
After that, he came secretly every night, and Liu Xiangyu waited for him every night.
Until one day, the Crown Prince, who had not visited her during the day for a long time, suddenly came to see her in broad daylight. Liu Xiangyu realized in a daze that the Crown Prince by day and the Crown Prince by night seemed to be different people.
Twins are considered ill-omened among the common people, and are burned to death as soon as they are born. The imperial family has no such custom, but twins are permanently barred from ascending to the highest position.
For the sake of the Crown Prince's position, the Noble Consort secretly sent one of her sons away and claimed to have given birth to only one child.
Years later, Jiang Dan became a hidden blade for his Crown Prince twin brother, a shadow forever confined to the dark. He shielded his brother from every danger and dealt with every problem.
When necessary, he even had to die for him.
But after learning the truth, Jiang Dan no longer wanted to be controlled by others.
The Crown Prince is heir to the throne, yet he's an unusually amorous man. His rear palace is full of beautiful women, but he never favors any of them. To keep up appearances, he gives Jiang Dan the job and tells him, "You can touch anyone except A Ni and the Crown Princess. Just make sure you don't get anyone pregnant."
Jiang Dan knows that A Ni is Liu Xiangyu, the woman the Crown Prince loves most.
As for the Crown Princess, she's merely a poor woman who receives neither love nor favor, with only the title of principal wife to her name.
The Crown Prince preserves his chastity for A Ni, so Jiang Dan will take her from him.
The Crown Prince forbids him from touching A Ni, but he intends to do so anyway.
What could be more satisfying than taking away the person someone loves?
Theme: Don't lie or deceive others