Hugo is 19 years old. Like every summer, he spends his holidays on an Atlantic island, in the small family house. But this year is different: Hugo has undergone a physical transformation and arrives with his girlfriend, Queen, a beautician whose lively chatter and long, glittery nails contrast sharply with the young man’s modesty and shyness. Before long, the couple becomes the focus of everyone’s attention.

Forbach, Eastern France. Present day. Since his wife walked out to the family, Mario has raised their two daughters of his own. Frida, 14, blames him for her mother leaving. Niki, 17, ...