In 1978, Gigi, Jérôme, Christiane, Jean-Claude, and Bernard simultaneously arrive at the Club Med in Assinie, Côte d'Ivoire, each with their distinct personalities. The vacation spot operates on a system where guests pay with beads worn as necklaces and enjoy a series of organized activities and shared leisure facilitated by "gentil organisateurs" (G.O.) for the "gentil membres" (clients).
Bernard reunites with his wife Nathalie, who has been at the village for a week. Popeye, the sports chief, along with animators Bobo and Bourseault, welcome them. The small group quickly forms bonds, as everyone hopes to make new connections. Both Bernard and Nathalie decide to have extramarital affairs, while Jérôme, a doctor, and Jean-Claude engage in unsuccessful attempts at flirting. Gigi finds love with Bourseault, while Christiane faces rejection.
However, a serious incident marks the end of their stay as Bourseault, Gigi's love interest, unexpectedly dies from a stingray sting. Following this tragedy, Nathalie and Bernard decide to stop their affairs, especially after Jean-Claude's unsuccessful advances. Bobo resigns in the aftermath.
