As the World Tree Yggsirad withers, the traitor Loki plots to end the world by sealing the River of Wisdom. To unlock the gate, he targets the two strongest Valkyries, Suvia and Sigurd, who carry the necessary keys within their bodies. After manipulating them into a conflict that leads to their capture, Loki uses sadistic torture and powerful love potions to break their will and claim the keys for himself.