Flesh + Blood (1985)

Promised to a nobleman's son, virginal Princess Agnes is carried off by a gang of mercenaries who had been betrayed by his father. She soon allies herself with their leader but her true allegiances remain suspect. Has she really given herself over to him? Or does she feel some kind of commitment to Burlinson, who she had met just before she was kidnapped? When Burlinson pursues the gang, is captured by them, and the bubonic plague starts raging, she's forced to make some choices.