September 5 1975 is remembered as the last concert of the duo Sui Generis. Charly Garcia and Nito Mestre performed that night at Luna Park (Buenos Aires, Argentina) in front of 30,000 people, defining an era in Spanish-speaking music. More than 40 years later, Nito Mestre remembered that farewell concert by paying a long awaited tribute to the band and its timeless music.