As Ragnarok looms, the trickster Loki breaks free from his chains. In the battle to come, all shall die, but Ragnar will do anything to save his gods. Einer scours the nine worlds for Hilda, who walks among gods and goddesses, searching the truth of the Runes. For centuries Siv has run from her past, but she knows that to protect her daughter, and Midgard, she will have to face her worst fears. It is time to confront the Alfather.