Katherine comes to the court of Edward III at the age of fifteen. The na?ve convent-educated orphan of a penniless knight is dazzled by the jousts & the entertainments of court. Nevertheless Katherine is beautiful & she turns the head of the King's favourite son John of Gaunt. But he is married & she is soon to be betrothed. A few years later their paths cross again & this time their passion for each other cannot be denied or suppressed. Katherine becomes the prince's mistress & discovers an extraordinary world of power pleasure & passion.