A prime minister's legitimate daughter, in order to be with her beloved sixth prince Aring forever, she pretended to marry Ouyang Jing and promised to elope after completing the mission for him. However, she was killed by him on their wedding day.
When she came back again and opened her eyes, her body turned into that weak cousin, and her hand was tightly held by the person next to her. And wasn't that person the person with whom we once sworn an oath?