Victor, in his early 20s, works at the town hall and lives with his girlfriend Charlotte, who is expecting their first child. When an incident happens at the nearby nuclear power plant, he and his high school friends are forced to confine themselves inside a farmhouse, whereas they should have evacuated the area. As the rain is threatening, they are keeping an eye out for the radioactive cloud. The next 24 hours will be crucial.
Antoinette, a school teacher, is looking forward to her long planned summer holidays with her secret lover Vladimir, the father of one of her pupils. When learning that Vladimir cannot come because his wife organized a surprise trekking holiday in the Cévennes National Park with their daughter and a donkey to carry their load, Antoinette decides to follow their track, by herself, with Patrick, a protective donkey.
Théo and Hugo meet in a club and form an immediate bond. Once the desire and elation of this first moment has passed, the two young men, now sober, wander through the empty streets of nocturnal Paris, having to confront the love they sense blossoming between them.
