In the midst of a bloody conflict, Lady Sif, the brave Asgardian warrior, watches her dear friend die in glorious battle – but her soul is not taken to the eternal halls of Valhalla. Enraged and petrified with fear that the afterlife is in danger for her and all Asgardians, she calls upon the aid of Brunnhilde the Valkyrie, the feared warrior charged with transferring worthy souls to the heroes' afterlife.

Together they search Asgard for answers. There are rumors of cities being attacked by a horde of soldiers who cannot be killed. Someone is building an immortal army and stealing Asgardian souls... A worthy challenge for two of Asgard's mightiest champions!