Returning from Switzerland to Rome, the boss prof. Salviati, called 'The Prince', finds his business compromised by Rudy, a small local bandit full of presumption, audacity and men ready to kill. Commissioner Baldi a young and brave employee, will fight against them with the help of an ex-employee Rampelli.

The film focuses on Murri; the token maverick cop. He is called in after a bunch of criminals pull off a successful prison break and spend the night picking off various informers and people they don't like. Murri investigates; hooking up with one of the criminal's nieces along the way. He uses his own methods; which mostly involve breaking all the rules, and thus comes under a lot of scrutiny from his superiors who don't take too kindly to the cop's way of working.

Two policemen of the Narcotics Brigade, Nicola and Roberto, end up in all kinds of crazy adventures while trying to do their job.

After a couple of 'special squad' cops are gunned down while chasing some kidnappers, the head of the squad takes it really personally! His violent path to find the kidnappers leads him to the upper echelons of the government. Now, the powers-that-be don't want to be found out and decide it's time to kill one more cop...

Seven novels of Boccaccio featuring dirty jokes.