Clasics dzieła

How can everything be dying yet be so beautiful?

Its about a girl called Lilian who made a bet with her sister about who is going to become a model first and then later on since her sister didn't want to become a model any more she decided to stop the bet. Lilian 's friend called jack was a spy but we didn't know. Beacuse of that she had to follow him beacuse she like likes him but she thinks its just as a friend. Later on she owned the agency and married jack.?