The documentary tells about the encounter of violinist Fabio Biondi with the 1690 "Tuscan" Stradivari preserved in the Accademia di Santa Cecilia, Rome. Biondi recorded with this instrument Biber's Chaconne in G minor (1676) in the Library of the Monastero di San Giovanni Evangelista, Parma. The video also tells about the recent research coordinated by Edizioni Scrollavezza & Zanrè, which has involved a team of international researchers and institutions, and brought to the publication of "Treasures of Violin Making" volume II.