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.
During a heat wave, strange clouds start pouring down acid rain, wreaking devastation and panic throughout France. In a world teetering on the edge, a girl and her divorced parents must join forces to confront and try to escape this climate catastrophe.
A few days before the baccalaureate, a high school student decides to settle accounts with the most cowardly teacher in the school.
