The fantasy adventure romp based on the legend of King Arthur continues. When the Lady Morgana is struck down with a mysterious illness, Gaius is at a loss for a cure. Thankfully a new physician, Edwin Muirden, is on hand to bring the King's ward back from the brink.

As the stranger charms his way further into Camelot's court, winning over everyone from Uther to Merlin, Gaius begins to doubt his credentials. Just who is the mysterious newcomer and what does he want with the royal family? Gaius' loyalty and bravery are going to be tested to the limit if he is to find out.

When Merlin decides to help a magical young fugitive, he finds an unlikely ally in Morgana.

The pair are desperate to smuggle the boy back to his own kind, but this becomes increasingly difficult, as the hunt for his whereabouts increases with every minute. Their task takes a dangerous turn when Uther declares that anyone hiding the child will be executed.

With their lives now on the line, can they sneak the boy out of the castle without being caught? And perhaps more importantly, just who is the mysterious child, and how does he know so much about Merlin?