The story of how Sicilian Mafia boss Tommaso Buscetta (1928-2000), the Godfather of Two Worlds, revealed, starting in 1984, the deepest secrets of the organization, thus helping to convict the hundreds of mafiosi who were tried in the trial held in Palermo between 1986 and 1987.

In the late-80s and early-90s, two prosecutors went after the mob in Sicily. Archival footage, gruesome photographs and new interviews are shown.