Romeo and Juliet secretly wed despite the sworn contempt their families hold for each other. It is not long, however, before a chain of fateful events changes the lives of both families forever.

During a weekend a group of friends, holed up in an isolated house in the mountains, are attacked by a swarm of killer horseflies that feast on human flesh like piranhas.

In a polluted future Venice researchers work to improve the situation. One day, unknown forces start killing them. A team of soldiers and a couple of civilians is sent to investigate. Soon, they encounter strange murderous creatures.

Special Forces Captain Aldo Paccione must pull together his former world team Delta Force and go deep within the mines of Sardinia when it is discovered that a vengeful band of mercenaries are developing deadly biochemical weapons.

A cemetery man must kill the dead a second time when they become zombies.

Young Florentines take refuge from the black plague and engage in bawdy adventures and lusty exchanges.