Merlin's home village of Ealdor is attacked by raiders led by the fearsome Kanen, but Uther will not do anything to help- to cross into Ealdor, which is outside of Camelot's boundaries, would constitute an act of war. Merlin leaves Camelot to help to defend his home- and is surprised to find help from Morgana, Gwen and Arthur. However, an old friend of Merlin forces the young sorcerer into making a difficult choice: will he use magic to save the village and thus reveal his secret to Arthur?
