When a deadly mist engulfs Paris, people find refuge in the upper floors of the buildings. With no information, no electricity and hardly any supplies, Mathieu, Anna and their daughter Sarah try to survive the disaster.
Eli lives with Marie, his strong-willed mother. Nostalgic for an unbridled youth, “the sex” is an obsession with the old lady. Intrusive, she would like her son to have the same sexual fulfillment as her. One night, Mary dies…