When a crime boss sends out his thugs to terrorize an entire city, they do whatever they want, which includes anything from petty theft to robbing the police station in broad daylight. Napoli spara! (internationally released as Weapons of Death and Naples shoots) is a "poliziottesco" film directed by Mario Caiano in 1977. It is an unofficial sequel of Napoli violenta, of which reprises the character of Gennarino (still played by Massimo Deda).

A robbery at a nightclub goes wrong.

After refusing his boss' marriage proposal, Mario gets caught in a fake homicide case and, with help from his friends and son, tries to prove himself innocent and run back to his hometown, Napoli.