Franck, a young man, frequents a secluded lakeside beach that is popular among gay men seeking casual encounters. He becomes infatuated with Michel, a strikingly handsome and mysterious man whom he meets there. Despite warnings from his new friend Henri, an older man who visits the lake for solace and companionship rather than sex, Franck is drawn to Michel's magnetism. The two quickly form a romantic and sexual relationship, and Franck's infatuation deepens. However, he soon witnesses a disturbing event involving Michel that raises unsettling questions about his new lover.

As Franck grapples with conflicting emotions—desire and alarm—he finds himself entangled in a complex web of passion, danger, and suspicion. Henri continues to offer a grounded, albeit cautious, perspective on the increasingly fraught situation. The serene lakeside setting becomes an oppressive backdrop as Franck's internal and external turmoil grows. Tensions escalate, leading to a gripping climax that forces Franck to confront the secrets he's been avoiding, ultimately challenging his perceptions of trust and love.