At the end of the 15th century, two traveling minstrels Gilles and Dominique come to the castle of Baron Hugues. Gilles charms Anne, Hugues' daughter, while Dominique charms both Hugues and Anne's fiance. Gilles and Dominique are not really in love: they were sent by the Devil to test desperate people. But Anne is so pure that Gilles is caught in his own trap... How will they fight against the Devil?