Petit Spirou invite Vert' à la maison pour jouer à la console et découvrir un nouveau jeu. Mais à peine s'installent-ils dans la chambre qu'un horrible bruit se fait entendre. C'est Grand-Papy. Son amie, Gourmandine, lui a offert un saxophone pour qu'il lui joue des airs romantiques. Et Grand-Papy a promis de répéter jusqu'à ce qu'il devienne un très grand musicien...
Little Spirou invites Virgil over to play video games, and try out a new one. But no sooner have they settled down in his room, than they hear a HORRIBLE noise. It’s Grandpop. His girlfriend Gourmandine has given him a saxophone so that he can play her some romantic music. And Grandpop has promised to practice until he becomes a VERY good player. Exasperated at the idea of having to listen to this terrible racket, Little Spirou decides to do WHATEVER it takes to shut up Grandpop’s saxophone for good…