In A FRENCH SUMMER, the relationships between two families are thrown into chaos during a sizzling summer in France. Walt, the father of one family, and Marie, the mother of the other family, have been good friends for years. As their families come together to share their holiday, however, they suddenly realise that their friendship has evolved into something more. In a bid to resolve the situation as best they can, Walt and Marie come up with a series of increasingly creative plans to spark a romance between their respective partners, Lieke and Luuk.