A 21st-century female agent transmigrates into the body of an ugly, dim-witted princess. After accidentally sleeping with an idle prince, she finds herself saddled with him, and can’t shake him off.
Everyone: …With a face like that, Prince Ning really went through with it?
The idle prince: How dare you point fingers at my darling wife? You wouldn’t want me to slap you with some made-up charge and throw you in prison, would you?
To keep her from being bullied again, he gives up his carefree life and begins making arrangements in secret, not realizing that she is even more ruthless than he is.
To break free of her family’s control, she plots at every turn, fights evil and punishes villains, and gradually unravels the mysteries around her. The two support each other through it all, content to be mandarin ducks rather than immortals.