Priscilla Villanueva is tired of practicing piano when all her friends are outside playing. Discouraged and bored one autumn day, Priscilla opens her sheet music and begins playing a challenging sonatina. Unfortunately, it is not long before she smashes her fingers against the keys in frustration. But when her fingers suddenly stumble upon a sticky A key, everything changes. After a beautiful, twirling column of colors rises from the piano keyboard, Priscilla falls off her bench in surprise. As a translucent man dressed in a tuxedo appears before her, the ghostly spirit who calls himself...