Synopsis:

Having feigned the thwarting of a kidnapping, also a sham, young Marco Sartori manages to get hired as a "gorilla” by the rich property developer Gaetano Sampioni, who is being extorted for six hundred million. But after various events, involving Marco getting beaten up and explosions on his building site, Sampioni decides to pay up. But Marco prevents him and manages to uncover the delinquents behind the blackmail.