Giovanna Dei, a young cartoonist, works on the violent comic strip "Doctor Dark". Unfortunately, young women are being killed in the style of the comic strip character and she becomes the main suspect.

A couple inherits a mansion, but when they move in they discover that it is haunted by the murderous spirits of people who have died there.

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.