She is a princess sent by the enemy country for marriage, and he is the youngest prime minister of the enemy country. The two were mortal enemies in their previous life - he wanted to help the puppet emperor ascend to power, and she wanted to use the emperor's power to avenge her mother. Every cooperation between them is a calculation, and every time they look at each other is a flash of sword. Finally he poisoned her with his own hands. After rebirth, she found that both of them carried memories of their previous lives, but the "starting time" of this life had shifted: she became his "prisoner" three days in advance. He thought she would still use him and then betray him like she did in her previous life, but in this life she chose a path that completely broke him down - she became his most trusted person, and then calmly married his mortal enemy: the emperor the moment he fell in love with her.
