Appease: Princess and the Pea Retold

A princess who refuses to be a prize. A prince's promise. Perhaps dragons aren't so bad after all.
Once upon a time...
Promised as a prize to any hero who can slay the dragon, Princess Sativa flees the palace in search of the prince she was betrothed to as a child. But there are many miles between her and the boy who has become a king.
Can a lone princess cross the sea and convince the king she's the princess of his dreams?