When a small town doctor buries his twin brother, a practitioner of the black arts, he believes him dead; but subsequent events force him to realize that his brother has, in fact, returned from the dead as a vampire and is seeking revenge on the doctor, who had killed him in self-defense.

In Africa, a professional hunter kills a male lion which is sacred to a local tribe which also practices voodoo; and when he returns to England, he finds himself deteriorating under the influence of a curse which they have placed on him for his sacrilege.