It's summer in Gironde. Mélissa, 15, has just moved into a residential housing estate. She meets Océane and Jessie with whom she befriends. The 3 girls invite a group of 5 boys to Mélissa's: Fred, the leader, Arthur, Omar, Bruce, with whom Mélissa falls in love and Tom, Bruce's little brother.

15-year-old Jack is on a French Exchange trip with his school. But his mum won't stop ringing to check-up on him. On his last night, his host falls ill and Jack is forced to spend the last day of the trip with his French teacher; the sexy, chic, mysterious Camille. But she is due to endure a family lunch to celebrate her cantankerous father's birthday. Jack's young yet sophisticated philosophy charms Camille and as the day goes on they bond. Without realising, they help each other to overcome their parallel family problems, teaching Jack a few lessons along the way.