The kingdom is on the verge of complete collapse and Morgana is poised to strike. Lancelot races back to Camelot with the dying Merlin leaving Arthur to continue on his mission to vanquish the Dorocha alone.
Merlin is a young warlock who arrives in the kingdom of Camelot after his mother arranges for him to stay with the court physician, Gaius. He discovers that the king, Uther Pendragon, has outlawed magic and imprisoned the last great dragon deep under the kingdom.
The dragon tells Merlin that he plays an important role: to protect Uther's son, Arthur, who will bring forth a great kingdom. When Merlin meets Arthur, he believes that he is arrogant and Arthur, likewise, views Merlin as subservient. Merlin must keep his magic secret or face being executed by Uther.
Merlin - The Darkest Hour - Part 2 Synopsis and Schedule