Lancelot du Lac is a 1974 French fantasy drama film written and directed by Robert Bresson. It retells the story of Lancelot and Guinevere's love as Camelot and the Round Table fall apart. It is based on Arthurian legend and medieval romances, especially the Lancelot-Grail cycle, and the works of Chrétien de Troyes.

Plot

After many bloody adventures, King Arthur sends his knights, who have been pledged by the late magician Merlin, to retrieve the Holy Grail, which is believed to be hidden somewhere in Brittany. The mission proves futile and the knights are decimated. Among those who return two years later is Lancelot, the lover of Queen Guinevere. He is haunted by the death of his comrades and torn between his duty and his love for Guinevere. He wishes to end their affair, but Guinevere refuses. She implies that instead of being slain by enemies, the knights sent for the Grail had turned on one another, Lancelot chief among them. To make matters worse, many knights of Camelot are wary of or despise Lancelot, who is seen as a favourite, even by members of the Round Table, save for a few, among them Gawain and Lionel, who are his greatest friends among the knights' ranks. Mordred comes upon Lancelot and Guinevere's secret meeting spot and discovers her scarf there.