Morgan puts on a feast for King Arthur and his Knights at Castle Pendragon which turns to panic as the castle comes under attack. As Arthur and Morgan's men join forces to fight, Merlin believes a plan is afoot.

Arthur and his men ride out to defend Bardon Pass after learning of an attack. Merlin comes to the realization that he's been seduced by a shape-shifting Morgan. The men begin to lose faith in Arthur.

Arthur must defend himself against mercenaries on Bardon Pass. Morgan leads Sybil and her followers to Camelot where she receives information that leads her to believe her ambitions will be realized.