This is an adventure story based on the real-life escapades of a fifteenth-century robber-knight. Humphrey Kynaston, who was born into an aristocratic family, became the rebel, the black sheep of the family, preferring company in the local inns and gambling dens. Outlawed he escapes to live in a cave. Here he lives with his infamous and legendary horse, protected by the local peasantry. Disowned and disinherited by his father, he resorts to robbing the wealthy merchants who pass along the road. He rewards the local peasants who protect him. Fantastic tales abound about his adventures and amazing feats. His horse is endowed with magical powers, aiding him to avoid capture by the authorities. This is the tale of his quest for adventure and romance on the wrong side of the law.