She bore his child and then he made her sister Queen. An extraordinary tale of sex, passion and royal intrigue. This is the little-known story of Mary Boleyn who was mistress to King Henry VIII before he married her older sister, Anne. Inspired by Philippa Gregory's best selling novel, this film is about great families jockeying for position and using their daughters as pawns in a deadly game. Set during one of the most notorious periods in British regal history, it is a powerful narrative and at its heart is the relationship between two rivals - the Boleyn sisters.