The Throne... ( Bwwm)

Mary is a 15 yr old girl going on 16 black girl. Her parents travel and stay in different countries for business. Mary and her parents find themselves moving to England. While in England Mary meets Jason who is a 17 year old white boy who is the prince of England and next heir to the throne. While Mary and Jason finds love, someone is taking over the throne by force. Can Mary help Jason get the throne back?