Despite Merlin's protests, Arthur kills a unicorn while out hunting and presents Uther with its horn. Father and son ignore Gaius's warning that it is bad luck to kill a unicorn, and soon the crops wither and the well water turns to sand. The mystic Anhora, guardian of the unicorns, arrives in Camelot to tell Arthur that his stupidity has cursed the land and that he alone can lift that curse. He faces a number of tests, first in Camelot and then in the Labyrinth of Gedref. Merlin follows him despite being told to stay behind. In the end, Arthur saves the day with a demonstration of selflessness, ultimately restoring the welfare of Camelot and the unicorn itself.
