In a near-future where artificial intelligence reigns supreme, human emotions have become a threat. To get rid of them, Gabrielle (Léa Seydoux) must purify her DNA by going back into her past lives. There, she meets up with Louis (Georges MacKay), her lover. But she's overcome by fear, a premonition that a catastrophe is coming.

Music plays a key role in the entire filmography of Bertrand Bonello, who began his career as a musician, and it’s more true than ever with The Beast. Recorded for the most part during the writing of the screenplay, the score offers a wide variety of colors and genres. Starting with the prologue, it takes us into a slasher atmosphere, invading us with fear and melancholy, and thrilling us during the many club scenes.