David must fight for his life against the gangsters who killed his brother for a CD filled with proof of their illegal activities. When David gets possession of the CD they go down to Mexico where David lives as a shark hunter. Who will get David first, the gangsters or the shark?

The Roman taxi driver Pietro Marchetti finds himself to witness a mafia crime. Having to testify at the trial, he is checked by the police, especially when he has to go to the United States to attend the graduation of his son Francesco.