Three girls, each about 15, deal with puberty, the onset of sexual attraction, and, for two, the pressure of virginity. Marie, who's slight and diffident, quiet and nearly expressionless, is friends with Anne, who's a bit chunky and impulsive and has decided that François will be her first love. Watching synchronized swimming, Marie is suddenly attracted to the team captain Floriane--beautiful, aloof, tall, and rumored to be a slut. François pursues her and Marie begins to hang around her; they trade favors, and an odd friendship forms. Each experiences her own first, and Marie must sort out attraction and friendship.