I enjoyed "Stranger by the Lake" very much on several different levels. It features a compelling story line with plenty of suspense heightened by excellent acting and lovely, sensitive cinematography. However, this picture isn't for the faint of heart, so homophobes and prudes will want to give it a wide berth.
The plot revolves around a series of inexplicable decisions made by Franck, a handsome, 30ish vegetable seller who regularly visits a gay beach and cruising ground. The beach is inhabited by a largely unvarying selection of men who are completely indifferent to their "neighbors" except for one highly specific service that they can, and often do, render one another in the nearby woods. The men exploit and are exploited with a ruthlessness that I found stunning, familiar and sad.
This is a ground-breaking film in at least two ways. First, it is the most explicitly and unapologetically erotic art-house movie since Oshima's "In the Realm of the Senses," except that in this case all of the on-screen sex is gay. Second, it is really not a "gay film" in the sense that it is actually a story about human callousness and depravity. In other words, the gay characters and gay sex are almost incidental to the true message being conveyed in this movie: that human beings can be truly, and quite casually, inhuman toward each other. This is in contrast to many other "gay themed" titles where the "gayness" of the story line is the most important element in the film's identity. One could easily make a straight version of "Stranger by the Lake" and it would work equally well. Nonetheless, there is most definitely a certain "je ne sais quoi" in "Stranger by the Lake" that a heterosexual picture would be quite unequipped to deliver upon.
If you like your movies strong, suspenseful, lyrical and sleazy you will want to make a point of seeing "Stranger by the Lake."