Thor fights to restore order across the cosmos, but an ancient race led by the vengeful Malekith returns to plunge the universe back into darkness. Faced with an enemy that even Odin and Asgard cannot withstand, Thor must embark on his most perilous and personal journey yet, one that will reunite him with Jane Foster and force him to sacrifice everything to save us all.

A threat against the Earth and all Nine Realms by a shadowy enemy that predates the universe finds Thor struggling to restore order across the cosmos, reuniting with Jane Foster and contemplating a brutal sacrifice.

"When Dr. Jane Foster lifts the mystic hammer Mjolnir, she is transformed into the Goddess of Thunder, the Mighty Thor! Her enemies are many, as Asgard descends further into chaos and unrest threatens to spread throughout the Ten Realms. Yet her greatest battle is against a far more personal foe: the cancer that is killing her mortal form. When Loki steps back into Thor's life, will it ease her troubles or only add to her pain? It's time to find out...