When Sherlock was sent by his brother to sign a peace treaty with the newly Crowned King Arthur of Camelot, he certainly did not suspect what and who awaited him there. Enemies form alliances, kingdoms are in peril, and a raven-haired boy rediscovers his past.

A new evil arises, one that threatens the foundations of magic itself. But Merlin, this time, is not alone in his fight. The Great Dragon unveils a secret prophecy. The time of legends is nearing.