In Asgard, post-Avengers, Loki is drawn into a whirlwind of deceit and ancient blood debt. At the same time, a shadowy menace stalks Asgard, eluding capture despite Thor's best efforts. When these two quests intertwine, Loki must confront both the rift between himself and his brother, and the sacrifices he is willing to make to meet his heart's greatest need. Loki/Sigyn