The big basketball game against the Yellow Giants is coming up, but the basketball ninjas and their team are not exactly in top form. Leon in particular has massive problems with his throwing technique. Max therefore promises to train Leon until the game in a week. But during his piano lesson, Max learns from Maestro Barenboim that he has entered him in a piano competition. And not just for any piano competition, but for the competition for top-class young artists. Too bad that it will take place the day before the big basketball game.