Fiction drama about the meeting between Nadia Boulanger and Astor Piazzola that changed both the history of tango and the life of the musician. The famous author of "Adios Nonino", "Libertango" and "Oblivion" abandoned when young the tango and the bandoneon to learn and compose classical music. The meeting with the famous french music teacher Nadia Boulanger helped Piazzola to retrieve his musical roots and to revolutionize the argentine tango with new techniques. Without Boulanger, Piazzolla would have never existed as such.