The secret weapon: refurbishing a Ferrari back to racing condition to get Palma on the same playing field, with Tagliaferri getting his driving skills up to snuff.
That gives Paolo the idea to plant an undercover female operative 's Senatore on the scene who also happens to be his bedmate , but that in turn leads to another unexpected chain of bloody consequences as the frustrated investigator finds his progress halted at every turn.
In the featurette "Rat Eat Rat" 39m8s , Vittorio Salerno and actress Martine Brochard explain how this film emerged from a collective of nine filmmakers who wanted to create low-budget films due to financial constraints at the time, with this one inspired by random territorial urban crimes at the time symbolized by the real rat self-slaughter seen in the film.
"It's Not a Time for Tears" don't worry, these titles make more sense when you've seen the film devotes 32m55s to assistant director Claudio Bernabei, who goes through this film and the rest of his career including other familiar characters like his mentor, Joe D'Amato.
Things escalate when the trio takes a female hostage after one stickup and winds up terrorizing and murdering her in a bathtub, after which they decide to set their sights on the local hooker population.