When Gwen's father Tom helps a renegade sorcerer turn lead into gold, he is arrested and faces trial for sorcery. Despite pleas from both Arthur and Morgana, Uther is adamant- Tom will be tried and, if found guilty, will be executed. Morgana tries to help Tom escape but tragedy ensues... and Morgana becomes hellbent on revenge.
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.