Title Character slays swan, whereupon the knights guarding the Holy Grail begin to suspect he may be the Grail King,
before realising he’s nothing of the sort. A wicked sorcerer who even has a magic garden at his disposal wants to put
Title Character under his power with the help of a lady condemned to eternal atonement for her sins, but he then
disintegrates a castle just like that. He returns to the knights, heals the king before becoming king himself anyway
and redeeming the lady, who promptly dies.