The evening after their first adventure, Franck witnesses Michel drown another lover picked up on the beach in an extraordinary long shot that's the film's centerpiece. Instead of calling the police, he is drawn more and more towards Michel, even as local police starts an investigation. The unsmiling inspector assigned to the case (Jérôme Chappatte) is faced with a daunting task. He starts gathering information in a place designed for people to lose their official identities and plunge into unbridled desire. A cat-and-mouse game ensues, with Franck becoming literal prey in the final scenes, shot in the dark and more primal in their feel than any of the sexual encounters depicted thus far.
The entire microcosm of the film is highly ritualized: from the looks and gestures signaling erotic interest (or lack thereof) to the way individual characters move and interact. Henri's arms are forever reclusively folded on his chest, the inspector holds his hands behind his back like a cartoon of a detective; and Michel seems forever ready for a photo shoot of his hairy chest and dazzling smile. Nudity may not be obligatory at the beach, but it is both welcome and rampant: I cannot think of any other movie that's so open to naked male bodies and treats them so casually (the whole of the clothing in "Stranger by the Lake" would scarcely fill up one drawer).