This popular mediaeval ballad is in alternate fragments of verse and prose, and relates how the Count of Valence made desperate war against the Count of Biaucaire, a very old and frail man, who saw that his castle was in imminent danger of being taken and sacked. In his distress, this old lord besought his son Aucassin, who so far had taken no interest in the war, to go forth and fight. The youth, however, refused to do so, saying his heart was wrapped up in love for Nicolette, a fair slave belonging to a captain in town. This man, seeing the delicacy of his slave and realizing she must belong to some good family, had her baptized and treated her as if she were an adopted daughter. On account of Nicolette's lowly condition, Aucassin's father refuses to listen when the young man proposes to marry her, and sternly bids him think of a wife better suited, to his rank. The young lover, however, vehemently insists that Nicolette is fit to be an empress, and vows he will not fight until he has won her for his own. On seeing how intractable this youth is, the father beseeches the owner of the slave to clap her in prison, so that Aucassin will not be able to get at her in any way. Heart-broken to think that his lady-love is undergoing captivity in his behalf, Aucassin spends his time moping. To induce him to fight, his father finally promises that if he will go forth and drive away the foe he will be allowed to see Nicolette and kiss her. The prospect of such a reward so fires the young hero, that he sallies forth, routs the besiegers, and, seizing the Count of Valence, brings him back a prisoner. On entering the castle, he immediately begins to clamor for Nicolette, but his father now declares he would rather see the maiden burned as a witch than to let his son have anything more to do with her. Hearing this, Aucassin indignantly declares such being the case he will free his prisoner, an act of generosity which infuriates his father, who hopes to be enriched by the count's ransom. To punish Aucassin, the Count of Biaucaire now thrusts him into prison, but, although the lovers are sharing the same fate, they languish apart, and, therefore, spend all their time lamenting. One night, when the moon is shining bright, Nicolette, who has heard she is likely to be brought to trial and burned, decides to effect her escape. As the old woman who mounts guard over her is fast asleep, she softly ties together her sheets and towels, and, fastening them to a pillar, lets herself down by the window into the garden, from whence she timidly steals out into the night.