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...

Jérémie returns to his hometown for an old friend’s funeral. In this village where so much goes unsaid, he must contend with rumours and suspicion, until he commits an irreparable act and finds himself at the centre of a police investigation.