White Roses and Red Blood

The Kingdom of Rubicund and the Kingdom of Weiss have been at war for decades. Tired of war, and hungry for peace, the King of Rubicund asks for the hand of the eldest princess of the Kingdom Of Weiss in an attempt to join their kingdoms and end the bloodshed. Estella the eldest princess is devasted by the King of Rubicund's proposal. So she pleads with her younger sister Elesha to take her place as she is desperate to escape court life and live quietly with a duke she has fallen in love with. The King of Rubicund has never laid eyes on the eldest princess of the Kingdom of Weiss. What will happen when he uncovers Elesha's true identity?