A famous opera singer, Giorgio Fini, loses his voice during an American tour. He goes to a female throat specialist, Pamela Taylor, whom he falls in love with.

The docudrama recounts the five years (from 1974 to 1979) in which lawyer Giorgio Ambrosoli investigated the workings of a corrupt and lethal system, seen through the eyes of Finance Police Marshal Silvio Novembre and reconstructed by mixing fictional scenes, archive footage, and valuable testimonies.