Carabinieri's lieutenant Duilio Cordelli is in charge to investigate on a fake banknotes traffic. He discovers that a 60 billion lira bank robbery is linked with his case. Things get more complicated when the main suspected, Lorenzini, is killed. More, Cordelli villa is blow up and the evidences drive to the conclusion the whole case could be solved only flying to London. Here another impediment waits Cordelli and his superior Col.