Valentine the mouse is jealous of the other animals. The heart of the whale or the elephant sounds like a great drum, and the cat’s heart seems to purr. But he cannot hear his own heart. And he longs to dance to the rhythm of his heartbeat! Together with the orchestra, he searches for the piece of music that makes his heart leap, so that he can finally feel and hear it beating. Which music makes your heart beat faster? Which instrument is your true love?