Alice Patten

When a mysterious warrior challenges Arthur to a duel, no one could possibly predict the devastating chain of events that is set in motion – least of all the young Prince himself. But Arthur and Merlin soon find themselves on a strange quest at the behest of the beautiful Morgause (Emilia Fox). Through her Arthur discovers a dark secret which could bring about the downfall of the kingdom.

Merlin and Arthur have been on many quests in search of the missing Lady Morgana. A despondent Prince is all but ready to give up. But as they recover from their latest skirmish a bruised, bloodied figure emerges from the mist... it is the Lady Morgana. King Uther is overjoyed, but then starts to mysteriously lose his mind. Merlin thinks that magic is the cause. Could this be the work of his dutiful ward? The young warlock puts himself in grave danger trying to find out whose side Morgana is really on.

Whilst Merlin heals from the Serket's poison, Morgana and Morgause continue with their evil plan. They have mentally incapacitated Uther and convinced his enemy, Cenred, to invade Camelot. The fate of the kingdom now rests on Arthur's shoulders. The Prince and his knights resist the invaders, but what tricks do the witches have up their sleeves? Can Merlin stop Morgana in time to save Arthur from the enemy within?