The film follows Vincent who works the night shift on the Grand Ciel building site, which is set to be a futuristic district. When a worker disappears, Vincent and his colleagues suspect the team leader of hiding the body somewhere on site. But Vincent is soon party to strange manifestations, and another worker disappears.

In the heart of a city, the inhabitants of a tower wake up one morning to find that their building is shrouded in an opaque fog, obstructing doors and windows - a strange dark matter that devours anything that tries to pass through it. Trapped, the residents try to organize themselves, but to ensure their survival they gradually succumb to their most primitive instincts, until they sink into horror...

2019 film directed by Olivier Nakache and Éric Toledano