The story follows a 16-year-old Icelandic boy, Ari, who lives with his mother in Reykjavík, She has to leave the country for a new job, sending him back to the small town of his youth. There he finds his old friend, suddenly a young woman with a tricky romantic relationship; and his father has become a victim of the financial crisis.

Samir, a lanky crane operator in Montreuil, falls madly for Agathe. As master swimmer at the pool Thorez he decides to take swimming lessons with her. But the lie does not last three lessons - Agathe hate liars. Chosen to represent the Seine-Saint-Denis, Agathe flies to Iceland for the 10th Congress of the International Masters Swimming. Samir has no choice but to fly in turn also.