Bastien, who is almost fourteen, is impressed by 16-year-old Chloé, who is unabashedly moody and prefers to avoid adult supervision. Despite their age difference, Chloé is charmed by Bastien and invites him to parties. She also likes to frighten him with stories about a child's spirit that still haunts the waters where they swim. Now in love with the worldly-wise Chloé, Bastien is ready to overcome his fears and win her heart. But an event at the end of the idyllic summer vacation causes a crucial turn in Bastien's life.