In her previous life, she was a lonely agent killer with a cold heart. Once he traveled through time and had relatives who loved him, fate took them away one by one.
In order to take revenge, she had to separate from the man she loved, abandon her love, disguise herself, and be an obedient and good girl. He even voluntarily entered the game and became everyone's pawn.
He had someone he loved, but he had to marry the daughter of his political enemy. In an accident, he met a woman who would make him crazy for the rest of his life. Only then did he know the true feeling of loving someone.
Just when he thought he would never meet the woman hidden in his heart again, fate made them meet again. Even though she didn't like him at all, he was still happy with her. He believes that "where sincerity reaches, gold and stone will be opened."