In Baldur's Gate III, mind flayers have infected you with a parasite that threatens to turn you into one of them. After their ship crashes in the Sword Coast outlands, you head toward civilisation in search of a cure.
Beyond your own predicament, Faerûn faces a cult gathering monsters and people under the banner of a mysterious god called the Absolute. Your search draws you into a conspiracy reaching as deep as the Nine Hells, with the city of Baldur's Gate ahead.