Samir, a tall and slender crane operator from Montreuil, becomes infatuated with Agathe. To get closer to her, he enrolls in swimming lessons at the Thorez pool, where she is an expert swimmer. However, his deception is short-lived, as Agathe despises dishonesty. When Agathe is selected to represent Seine-Saint-Denis at the 10th Congress of the International Masters Swimming in Iceland, Samir feels compelled to follow her there.