Franck (Pierre Deladonchamps) regularly goes to a local lake that doubles as a cruising zone. He has his eyes set on Michel (Christophe Paou) but he appears to have a boyfriend. So Franck starts talking to Henri (Patrick d’Assumçao) who just likes to sit at the lake. Then Franck happens to see how dangerous Michel actually is – but also sees his chance to realize his passion for him.
L’inconnu du lac is beautifully shot and shows the cruising scene without any moral outrage. But other than that it is frustrating and boring.