In Paris, in the beginning of the Twentieth Century, Cesar Charron owns a theater at the Rue Morgue where he performs the play "Murders in the Rue Morgue" with his wife Madeleine Charron, who has dreadful nightmares. When there are several murders by acid of people connected to Cesar, the prime suspect of Inspector Vidocq would be Cesar's former partner Rene Marot. But Marot murdered Madeleine's mother many years ago and committed suicide immediately after.
A playboy adventure novelist joins his publisher on an expedition to Voodoo Island in the Caribbean, where a cancer researcher is being forced to turn the tribes-people into zombies.
Dr. Roger Girard is a rich scientist conducting experiments on head transplantation. His caretaker has a son, Danny, who, although fully grown, has the mind of child. One day an escaped psycho-killer invades Girard's home, killing Danny's father before being gunned down himself. With the maniac dying and Danny deeply unsettled by his father's death, Dr. Girard decides to take the final step and transplant the killer's head onto Danny's body.
After her prostitute mother and her john are beaten to death while they are asleep in bed, teen-aged Ellie Masters is sent to an isolated orphanage run by a mysterious woman and her handyman, both whom she comes to suspect are hiding dark secrets.
The inhabitants of a small, remote island have been practicing voodoo rites and worshipping an evil priest named Damballah for years, but the local law officials generally turn a blind eye to this death cult's bizarre activities. Captain Labesch arrives from the mainland, determined to crack down on the island's lawlessness and clean up the ineffectual, hard-drinking police force. He appeals for assistance from wealthy plantation tycoon Carl Van Molder, who owns nearly half of the island and wields a great deal of influence over the population. Van Molder has made the study of parapsychology his life's work and believes in the secret powers of the mind. He warns Labesch not to interfere with this forgotten island's ancient ways. Also visiting is Van Molder's niece, Annabella, a temperance crusader who wants her uncle to help fund the International Anti-Saloon League. She falls in love with handsome police lieutenant Andrew Wilhelm
After a schoolgirl is raped while taking a short cut through the local woods, and another murdered a few days later, the police are baffled. With the help of a reporter, and against the wishes of a local psychologist, a young schoolteacher uses herself as bait to lure the perpetrator out.
After a landsman in 18th century England discovers a corpse covered in fur buried in a field, the town becomes infected by "the devil's skin," leading the local children to engage in demonic rituals and criminal behavior.
When socialite and heiress Julie Wardh begins receiving blackmail letters attributed to a mysterious serial killer, she suspects her cruel and sadistic former lover Jean is behind them. With her husband Neil frequently out of town, she falls into the arms of her friend's cousin George, and as the unknown assassin begins to make his move, she fears that one of the three men in her life may be the killer.
A family of vampires takes over an estate known as Carfax Abbey. Since inbreeding is destroying the family line, they need new blood to keep the family going, so they set out to find new sources.
Two young English women go on a cycling tour of the French countryside. When one of them goes missing, the other begins to search for her. But who can she trust?
In seventeenth century England Lord Whitman wages unending war on what he sees as the ever-present scourge of witchcraft, and many local villagers have suffered at his hands. But one victim uses her occult powers to curse his family, enlisting unknowing help from one of the household.
An American writer living in Rome witnesses an attempted murder that is connected to an ongoing killing spree in the city and conducts his own investigation, despite he and his girlfriend being targeted by the killer.
In 1700s Austria, a witch-hunter's apprentice has doubts about the righteousness of witch-hunting when he witnesses the brutality, the injustice, the falsehood, the torture and the arbitrary killing that go with the job.
In 1685 England, an overzealous Lord Chancellor condemns various rebels and "witches" to satisfy his political whims, ignorant of the true consequences of his actions.
Dr. Henry Armitage, an expert in the occult, goes to the old Whateley manor in Dunwich looking for Nancy Wagner, a student who went missing the previous night. He is turned away by Wilbur, the family's insidious heir, who has plans for the young girl. But Armitage won't be deterred. Through conversations with the locals, he soon unearths the Whateleys' darkest secret — as well as a great evil.