With access to tapes that have been hidden for over 40 years, this documentary goes behind the legend of the 1963 heist to uncover the true story of the crime of the century. Through tape recordings made by one of the key masterminds, the film explores the truth about the background to the robbery, and the audacious planning to carry it off, as well as revealing how one of the men managed to escape the police and live off his share of the loot until he died a few years ago.