Abel, Marianne and their 13-year-old son Joseph live together in Paris. Their everyday existence is thrown into turmoil when Abel and Marianne discover that Joseph has secretly sold valuables from the family home to finance a mysterious ecological project he and his friends have in Africa. They’re about to save the planet.

Sofia, a Greek woman, left her a 6 years old son to her father and has recently arrived in Paris, looking for a job. She starts working as a night watchman on a building site which used to be a luxury hotel. As she feels that she does not belong to this place, she finds out that she is not the only one as she encounters an unusual stranger.