Dragged back into the Realm of Myst against her will, Robyn finds herself fighting the mysterious assassin, Avella. As Gisbourne watches from afar, putting all of the pieces into place for his endgame, the citizens of Nottingham are left at the mercy of the monstrous Dark Horde. Robyn must return to the people she once liberated to lead their rebellion but will she survive Avella's wrath long enough to do so?