The episode follows the arrival of , a mysterious former pupil of Gaius, who claims to have found the key to the Tomb of Ashkanar .
: The tomb supposedly contains the last dragon egg, a prize that attracts both the untrustworthy Borden and Merlin, who feels a duty as a Dragonlord to protect it. Watch www xrysoi se Merlin 2008 S04E04
: Kilgharrah declares that the birth of a rare white dragon is a good omen for the future of Albion , symbolising the peace Merlin and Arthur are destined to build. The episode follows the arrival of , a
: In the final scene, Merlin takes the egg to the Great Dragon, Kilgharrah. By giving the dragon a name— Aithusa , meaning "Light of the Sun"—Merlin calls it into the world. The episode follows the arrival of