The seat at King Arthur's throne is empty. The wisest of the magicians of Britain, Merlin, who predicted the birth of Arthur, a sovereign “endowed with the greatest power, to whose rule all kingdoms will submit,” has died. And now no one can help the king avoid the consequences of the wizard’s prophecy, or prevent the disaster that threatens the state from Mordred, Arthur’s bastard son, born by the half-sister of the legendary ruler. And the evil Day of Doom is coming. Mary Stewart's novels about the wizard Merlin and King Arthur are rightfully considered masterpieces of fantastic literature.