After a dying Voodoo queen chooses an adopted apprentice as her successor, her true heir is outraged. Seeking revenge, he buys the bones of Blacula the vampire off of a dealer, and uses voodoo to bring the vampire back to do his bidding. In turn, Blacula turns him into a vampire and makes him his slave. Meanwhile, a police officer with a large collection of African antiques and an interest in the occult investigates the murders caused by Blacula and his vampire horde.

Shortly after moving into a dark, brooding mansion, a psychologist and his co-workers are terrorized by a horrible evil being.

A Vietnam vet returns home from a prisoner of war camp and is greeted as a hero, but is quickly forgotten and soon discovers how tough survival is in his own country.