One evening while being punished by their parents, Sol and Remi, brother and sister, 5 and 8 years old, are bored in their attic: One sulks while looking at the full moon through the bull’s eye, while the other, determined to have fun, opens old worn trunks… When Sol finds the ball gown of an illustrious countess and Remi grabs a tails suit, they suddenly find themselves projected to the court of Vienna, surrounded by ghosts and notably the most stubborn of them all: Beethoven himself…