At 16, Billie is lingering behind in almost everything: in love, in her growth spurt which recently propelled her to almost 6 feet, in having her first period. In a hurry to catch up, she begins her summer as a lifeguard at the water park with her two best friends Rosine and Juliette, and her oh-so-perfect older sister Annette. Everything goes wrong when Billie and Annette both...