Dante Balestra is a philosophy professor who, after many years of absence, returns to Rome to take care of his son Simone. Fascinating and unconventional, the professor takes a class at the Leonardo Da Vinci high school where he applies his nonconformist teaching method and establishes a very special relationship with his students, including Simone himself. But his way of doing things soon leads to confusing private and professional life. The return from the past of Anita, a former flame of his (now mother of Manuel, the "black sheep" of the class) makes things even more complex.