A Miami TV reporter is sent to a local university to do a story on a professor who is cloning a cell from DNA found inside a meteorite. Soon after the reporter leaves, a gunman kills everyone in the professor's lab and steals the cell for a wealthy businessman. When the reporter learns that he is targeted for assassination as well, he enlists the help of two scientists to discover who is behind the crimes, why they stole the cell, and whether or not the cell should be allowed to continue living.

Rome, Italy, early 1980s. A guy who worked at the Blue Gay, a transvestite cabaret, is found murdered, strangled. Marshal Nico Giraldi is responsible for investigating, infiltrating the Roman Gay community.

After a nuclear war society breaks down into two groups, the evil Euraks, and the rebel Federation. A mercenary named Parsifal is hired by the Federation to infiltrate New York City, which is controlled by the Euraks, to rescue the only fertile woman left on Earth.

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).