Thor embarks on an adventure unlike any he's ever undertaken: a quest for inner peace. But his retirement is cut short by Gorr the God Butcher, a galactic assassin who seeks the annihilation of the gods. To deal with the threat, Thor enlists the help of King Valkyrie, Korg, and his ex-girlfriend Jane Foster, who, much to Thor's surprise, wields his magical hammer, Mjolnir, as the Mighty Thor. They set out on a perilous cosmic journey together to solve the mystery of the God Butcher's vengeance and stop him before it's too late.