Guided by a voice, Launcelot enters the ship of Percival’s dead sister. After a month he meets Sir Galahad at a landing and takes him aboard. They sail on together, encountering many adventures. Half a year passes; then a white knight brings Galahad a horse and calls him out of the ship and Launcelot’s company. A voice tells them they are parting until Judgment Day. Launcelot finds his way to Castle Corbenic, where the Grail is, and gets a glimpse of the Grail, but is struck down and thus miraculously prevented from drawing near. He lies in a coma for twenty-four days, then leaves the castle and turns back to Camelot.
