Gaspar Noé signs a piece lasting less than an hour, the result of a collaboration with the fashion brand Yves Saint Laurent. The result is "Lux Æterna", an intense and devastating coven that immerses us in the destructive world of filming at the hands of two actresses of the stature of Béatrice Dalle and Charlotte Gainsbourg.

Warning for photosensitive people, this film contains strong strobe images during much of its footage.

Charlotte Gainsbourg agrees to play a witch burned at the stake in the first film directed by Beatrice Dalle. But the anarchic organization, technical problems and psychotic breaks gradually plunge the filming into a chaos of pure light...