Marc and Suzanne leave the south of France and come to Paris where they share and apartment. One evening, at the swimming pool, Suzanne faints in the water and is saved from drowning by Marc and a young newcomer, Lucien. Once the incident is over, the three young people get acquainted. Lucien's somewhat awkward charm fascinates Marc. In spite of his misunderstandings, unexpected encounters and missed appointments, the now inseparable trio continue to "play the game" of an idyllic friendship, which is nothing more than an illusion.