Does this sound like a good book?

Im writing a book, and want to know if it sounds like a good idea: In a world of the future, the country is divided into two types of people, Chosens and UnChosens. Alex, the protagonist is Chosen with a perfect life at first. She becomes an UnChosen and joins a group of revolutionaries as they plan to overthrow the tyrannical regime. The book follows her as she goes to prison and enters politics. It also follows her friend, Dan, who is in the thick of the revolution. When a Chosen friend offers Alex a chance to get out of jail, she has to choose between freedom and life, or her prison lover, Harris. It sounds weird when I say it now, but in the book its actually pretty good.