Two people, each with their own purposes in mind, signed a marriage contract.
He needed a "loveless marriage" to prove to his brother and concubine that he had no interest in the throne; she needed a "royal marriage" to break the class ceiling of "commoner origin".
At first, it was just a deal to get what they needed, but in the days when they fought side by side against conspiracies from the palace and outside the palace, conspiracies of the chaebols, and public opinion disturbances, the fake show was really done, and feelings secretly emerged.
However, when the crisis was gradually eliminated, the crisis pointed to the contract itself - the concubine united with the noble forces to force Li Yan to annul the engagement on the grounds that "the princess was born a commoner and the royal family was humiliated".
When the contract is about to expire, will they choose to part ways, or will they turn this marriage from a "contract" to a "sincere" one?