Oscar, an adorable and bizarre alien from Pianota, the planet of Music, is forced to land on Earth due to a failure of his spacecraft. Here he makes friends with Tommy, a courageous and charismatic 10-year-old boy who receives a series of ultra-technological gadgets from his inventor uncle, Professor Leonard, for each mission. The two, united by their passion for music and love for all races, experience exciting adventures together in all corners of the world, solving mysteries and saving people in danger.