Arthur, 15, has a crush on Ouassima, who does not even look at him … While he has never been upset, she goes out with Matt, the handsome kid from college. To get closer to her, Arthur gathers a group of single losers and offers to give them lessons in fishing, at 10 euros per lesson. In the changing rooms of the swimming pool, a long intimate and collective learning begins on “girls and love: instructions for use”.