Cobra non è

A pair of Americans want to perform the greatest robbery: the treasure of San Gennaro, in Napoli.

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

Amedeo and Ofelia, middle aged brother and sister, own jointly an old decadent, but still attractive, condominium. They want to sell it, but before they have to evict all the tenants. Of course, these don't want to leave at all. The cat (Il Gatto), mascot and beloved by all, dies and this gives the two an excuse to enter the tenants' life. Amedeo starts to court the young Wanda and Ofelia seduces the priest Don Pezzolla. In the meantime police is looking for the cat killer...

Pasquale Bellachioma, the unfortunate Police Commissioner, creates a "master stroke" that can finally put it to light before their superiors, but the results is continuous failure.