since she is a spy you can say that she is spying an underground organization that the police found out initially thought the organization is brand new the more she realize that the organization is a lot bigger, how bout a detective who's parents are forcing him to get married forced marriage but he doesnt want to so he tries to find a girl to pair up with the act so that the parents can get off his back, its supposed to be a fake relationship but one of them started to get attracted to another