Collects Jane Foster & The Mighty Thor #1-5. Will Jane Foster don the mantle of Thor once more? When Mjolnir comes crashing through Valkyrie´s window, she fears the worst has happened to the God of Thunder. Where is Thor, and why did his mighty hammer seek out Jane? Asgard´s greatest enemies - including Hela, Ulik the Troll and the Enchantress - have mounted a shocking assault on the Golden Realm, and the warriors of Asgard are losing…badly. Valkyrie´s ally Rúna has managed to stave off total defeat, but the Asgardians desperately need Thor. Jane begins a quest to find the Odinson, but can she find clues to his whereabouts in Limbo - or will she lose herself to S´ym´s dark magic? And to save the day, must Jane Foster become the Mighty Thor once again?