When 16th-century France is troubled with intense politico-religious rivalry and Catherine de Medicis launches her attack on the Huguenots, the Comte de la Roche spares the life of his enemy, Rupert de Vrieac, a Huguenot, by making him an indentured servant. At the Roche castle, Rupert falls in love with the count's sister, Yolande, who treats him coldly. When the despicable Duc de Tours attempts to force himself on Yolande by threatening to torture Rupert, Yolande yields. Fortunately, Rupert's men arrive in time to kill Lupi, the torturer. The duke dies following a duel with Rupert, and Yolande persuades her brother to release Rupert from his bondage.