As Malekith's devious machinations continue to spread slaughter across the Ten Realms, the warmongering Dark Elf unleashes the Mangog — the manifested vengeance of a billion billion murdered souls. With Asgard in its sights, only the Mighty Thor possesses the power to stop this rampaging god-killer. From her hospital room, Jane Foster hears the call. Thor is needed again. Will she have the strength and courage to answer, even if it means making the ultimate sacrifice?