Police commissioner Lo Gatto is in charge of the local Italian police station within Vatican State. During an investigation, following the murder of a Vatican priest, he decides to question the Pope! For this reason Lo Gatto is sent to a Sicilian remote island Favignana. There is very little for the commissioner to do on the quiet island, so Lo Gatto decides to investigate the vanishing of a tourist which quickly becomes a very complicated affair.
June 27, 1980: a DC–9 flying over the Tyrrhenian Sea breaks up mid-air and crashes near the Italian island of Ustica, killing all 81 people on board. The official version blames the "structural failure" of the plane, but a young journalist smells a cover-up and starts to uncover the truth out of the 'invisible wall' of lies built by politicians and air force higher-ups.
The Roman Catholic Pope is planning a reconciliatory meeting with the head of the Ukrainian Orthodox Church, an event awaited for many generations. But suddenly, right while the Pope is addressing the crowds gathered in the Piazza Navone, a nun is assassinated by a Ukrainian, placing the upcoming talks between the two leaders in jeopardy. And the head of the American diplomatic corps (the nun was an American) assigns the investigation of the killing to one of his underlings, which leads the young man to investigate the Russicum, a center for the study of Russia within the Vatican city. And from there he finds himself caught up in an intrigue of international proportions, filled with agents and double agents, and ending with a revelation most unexpected.
It is the story of a terrorist who manages to escape during a transfer by sea and lands on a remote desert island where there is a large mansion inhabited by a little girl about 9 years old, a girl of 18, and their housekeeper.
The boy Vito is a portrait of beauty and wide-eyed innocence spawned from a violent family of kidnapers and murderers in the South of Italy. When his entire family is murdered by a rival clan of kidnapers, Vito must flee for his own life and in the end attempts to make atonement for some of his family's sins.