...And Suddenly It's Murder!

An anthology presents three storylines, all set in the Italian town of Treviso: A husband pretends to be impotent as a cover for having an affair; a bank clerk abandons his wife for his mistress, but the rest of the town's husbands become jealous and unite to conspire against them; and local men all seduce a promiscuous young woman, but when her father eventually reveals that she is underage, they all face prosecution for statutory rape.

Paolo, 40 years old, lives in a small Friulian town close to the north-eastern border. Unreliable and with a passion for good wine, he spends his days at the local tavern and stubbornly stalks his ex-wife.

The marquis Galeazzo di Torre Alta is murdered by a mysterious killer who calls himself Diabolicus. His heirs are his three brothers and a sister, but all of them, with the exception of Monsignor Antonino di Torre Alta, are killed by Diabolicus. The police are unable to solve the case, but when Antonino gives his inheritance to Pasquale Bonocore, illegitimate son of his father and Pasquale is in prison and therefore can't be the killer, all the clues are in the hand of the police.

When an upwardly mobile couple find themselves unemployed and in debt, they turn to armed robbery in desperation.

A vicious serial sex killer is on the loose, and landscape gardener and shop-window outfitter Loris is the prime suspect, thanks to his unfortunate habit of getting caught in compromising situations (for which there is always a totally innocent explanation that the police fail to spot). Undercover policewoman Jessica is assigned by eccentric police psychologist Taccone to follow Loris.