Three 15-year-old girls living in the ultra-modern Paris suburb of Cergy-Pontoise find the dynamics of their relationships gradually beginning to shift. Floriane is a beautiful blonde with a perfect body and remarkable talent in the pool, Marie is something of a tomboy taken to water, and Anne is an overweight-but-outgoing swimmer whose crush on a male swimmer is about to forever change the way these three disparate souls relate to one another.