The plot of Oliver runs as follows [129]: Oliver, the son of the King of Castille, becomes the close friend of Arthur of Algarbe, the son of his stepmother. When he has grown up, he flees from home because of the love which the queen declares for him, leaving to Arthur a vial in which the water would grow dark, were he to come into danger. He is shipwrecked while on his way to Constantinople, but, together with another knight, is saved miraculously by a stag, which carries them to England. Talbot, the other knight, is ill, and asks Oliver to take him to his home at Canterbury, where he dies. Because of debts that his parents will not pay he cannot be buried in consecrated ground till Oliver himself attends to the matter. The hero then starts for a tourney where the hand of the king's daughter is the prize. On the way he loses his horse and money, but is supplied anew by a mysterious knight, on condition of receiving half of what he gets at the tourney. Here he is victor, and after a further successful war in Ireland marries the princess, who bears him two children. While hunting he is taken prisoner by the King of Ireland and placed in a dungeon. Arthur, who is acting as regent in Spain, notices that the vial has grown dark, and sets out to rescue his brother. In Ireland he is wounded by a dragon, but is healed by a white knight, who notices his resemblance to Oliver, and takes him to London to solace the princess. He only escapes her embraces by the pretence of a vow, and sets forth to deliver Oliver. On their way back he tells of his visit at London, and so excites Oliver's jealousy, who leaves him. At home, however, Oliver discovers his mistake, and determines to find his brother, who, after a punitive expedition into Ireland, falls gravely ill. Oliver learns in a dream that Arthur can only be cured by the blood of his children, whom he slays accordingly. On his return home, however, he finds them as well as ever. Later appears the mysterious knight to demand his share of wife and children, as well as of all his property. As Oliver raises his sword to divide his wife, he is told to desist, since his loyalty is proved. The knight then explains that he is the ghost of Talbot. Later Arthur marries Oliver's daughter, and eventually unites the kingdoms of England, Castille, and Algarbe.