The ceremony to choose a king with the Sword in the Stone begins in Camelot, but not a single knight in the city can budge the sacred sword. Only the eldest prince, Flaig, is absent from the ceremony, leaving the mastermind Merlin utterly frantic. Ten years ago, an imperial edict named Arthur as heir instead. Now the legitimate eldest son, who has endured and bided his time, has returned, ready to ignite the ultimate battle for the throne.