During the late 17th and early 18th centuries, two violinmakers from the same small town - indeed, the same block in Cremona, Italy - were making the most sought - after violins ever created. Everyone has heard of Antonio Stradivari, but few know the name Giuseppe Guarneri del Gesù. Through interviews with historians, experts, luthiers, and leading virtuosos, this riveting documentary narrated by Alfred Molina tells the story of these two violin masters and why the stringed instruments they sculpted 300 years ago in Cremona are worth millions of dollars to musicians and collectors today.