At the school in the Country of Numbers, run by Professor Aristotle and his assistant Infinity, the peaceful life of the students is disrupted by the arrival of the Thousand, Aristotle's niece. In addition, due to an injury to the teacher, a substitute teacher arrives at the center, Miss Zenòbia, who will apply her despotism to the classes.

A new way to approach classical music, more fun, more original, more entertaining. Mozart Band arrives, and with it his four young members: Mozart, Betoven, Chopin and Verdi. Since the filming of a music video for a superstar to the mysterious theft of a valuable harp, Mozart and his friends live a host of incredible adventures. There comes a symphony of humor, adventure and above all, lots of music.