After his retirement is interrupted by Gorr the God Butcher, a galactic killer who seeks the extinction of the gods, Thor enlists the help of King Valkyrie, Korg, and ex-girlfriend Jane Foster, who now inexplicably wields Mjolnir as the Mighty Thor. Together they embark upon a harrowing cosmic adventure to uncover the mystery of the God Butcher's vengeance and stop him before it's too late.