At the moment when Donald Trump came to power, Benoit Cohen, a French film director living in the United States, learned that his mother was getting ready to take in an Afghan migrant named Mohammad in the 7th arrondisement mansion where she was living on her own. At the same time as he rages against the racist president who is threatening to close the borders, he cannot prevent himself from worrying about his mother–who without having breathed a word to him is about to open her door to a stranger.