The city is looking forward with anticipation for the Prince's birthday celebrations. Arthur's old adversary, Odin, promises to make sure it will be a party that Camelot will never forget. A deadly assassin is lurking set to strike amongst the guests at the party. Camelot is left feeling devastated as the dust begins to settle.
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.