The Warning (1980)

Original title: L'avvertimento

It is a law police officials obey out of fear. A rule chilling in its simplicity. Accept corruption...or die! They have sealed an unholy alliance. The great banks of Europe. And the blackhearted underworld empire. Together, with their matchless wealth, there is no stopping their almighty, corrosive power. Even the police force's investigation into the diabolical link has been polluted by corruption and terror! When key police officials of the inquiry are viciously assassinated, only two honest men remain--a commissioner and police chief--to carry out the suicidal investigation. And they must fight a deepening mistrust of each other. For they too, know the only rule of the game. They too, have been warned!