On the slopes of Mount Umbra, the Outworlders come face to face with the grim legacy of the Twilight Vanguard. A lone knight lies fallen upon the path to the Spire, but death has not stilled his blade. What begins as a confrontation with a cursed sentinel soon becomes a trial by fire, forcing the party to reckon with the weight of oaths, the corruption of ideals, and the haunting question of what they themselves are becoming in this world of shadows.