In Rome it hasn’t rained for three years and the lack of water is overturning rules and habits. Through the city dying of thirst and prohibitions moves a chorus of people, young and old, marginalised and successful, victims and profiteers. Their lives are linked in a single design, while each seeks his or her deliverance.

In 1976, when he was just 19 years old, Massimo Carlotto was accused of a murder of which he was the sole witness. As a result of this accusation, he faced 11 trials, spent 6 years in prison, and 5 years on the run. His legal ordeal lasted 18 years and ended in 1993 when the President of the Republic granted him a pardon.

Palermo, Sicily, 1984. Examining magistrate Giovanni Falcone allies with Tomasso Buscetta, a former mobster, to defeat the clan of Corleone, the ruthless Mafia faction that rules Cosa Nostra with an iron hand, cruelly eliminating all those who dare to oppose its immense power: other criminals, policemen, judges, even innocent civilians. One of them wants revenge, the other wants justice. But only one can survive such an unequal fight.

Rome, 1990. The night Italy's national football team is eliminated from the World Cup by Argentina on penalty kicks, a well-known film producer is found dead in the Tiber river. The main suspects for the murder are three young aspiring screenwriters, who–promptly taken to the police–start to tell their version of the story.

Sicily, Fascist Italy, 1925. Dictator Benito Mussolini appoints Cesare Mori, a man as tough as he is honest, as the new police prefect of Palermo and entrusts him with the arduous task of putting an end to the Mafia, a sinister criminal organization that has sown terror on the island for centuries.