Six children are found spread through out the world that not only have enormous intelligence, but identical intelligence and have a strange bond to each other.
A scheming widow hatches a bold plan to acquire her late husband's inheritance, unaware that she is being targeted by an ax murderer who lurks in the family's estate.
Honeymooning in Bavaria, a young couple becomes stranded and is forced to stay the night in the area. Doctor Ravna, owner of the impressive chateau that sits imposingly above the village, invites them to dinner that evening. Their association with Ravna and his charming, beautiful family is to prove disastrous.
After an astronaut space capsule is detonated in orbit, with the astronaut begging to be killed, a teenager couple finds a severed arm on a remote beach. The boy takes the arm home, where it becomes animate and the alien force which animates it soon possesses his mind as well.
In the sleepy suburbs of Miami, seemingly normal Egyptian immigrant Fuad Ramses runs a successful catering business. He also murders young women and plans to use their body parts to revive the goddess Ishtar. The insane Ramses hypnotizes a socialite in order to land a job catering a party for her debutante daughter, Suzette Fremont, and turns the event into an evening of gruesome deaths, bloody dismemberment and ritual sacrifice.
Lt. Andre Duvalier awakens on a beach to the sight of a strange woman who leads him to the gothic, towering castle that serves as home to an eerie baron.
In 1840s London, Dr. Thomas Bolton [Boris Karloff] dares to dream the unthinkable: experimenting with anesthesia gases to make surgery pain-free. While doing so, his demonstration before a panel of his peers ends in a horrific mishap with his patient awakening under the knife; he is forced to leave his position in disgrace. To complicate matters, he becomes addicted to his own chemical experiments and gets involved with a criminal gang led by Black Ben [Francis de Wolff], and a ruthless killer Resurrection Joe [Christopher Lee]. Unfortunately, this shady partnership leads Dr. Bolton to further ruin, culminating in his unwitting participation in murder — for which he becomes the first victim of a blackmail scheme.
Dr. John Markway invites three distinct individuals to the eerie and isolated Hill House to be subjects for a sleep disorder study. The unfortunate guests discover that Markway is far more interested in the sinister mansion itself — and they soon see the true nature of its horror.
A psychotic man schemes to drive his sister mad so that he can claim her inheritance, but a deadly game of cat-and-mouse begins when an imposter intervenes.
Mary Henry ends up the sole survivor of a fatal car accident through mysterious circumstances. Trying to put the incident behind her, she moves to Utah and takes a job as a church organist. But her fresh start is interrupted by visions of a fiendish man. As the visions begin to occur more frequently, Mary finds herself drawn to the deserted carnival on the outskirts of town. The strangely alluring carnival may hold the secret to her tragic past.
In late 19th century London, a woman weds a necrophiliac doctor whose first wife died under mysterious circumstances - and who might be returning from the grave to torment her successor.
Three stories adapted from the work of Edgar Allen Poe: 1) A man and his daughter are reunited, but the blame for the death of his wife hangs over them, unresolved. 2) A derelict challenges the local wine-tasting champion to a competition, but finds the man's attention to his wife worthy of more dramatic action. 3) A man dying and in great pain agrees to be hypnotized at the moment of death, with unexpected consequences.
A London opera house is haunted by tragic events on its opening night, but when its star is kidnapped, a producer tracks down the Phantom who is intent on seeking his revenge.
A captain and his sailors investigate the rampaging "Marsh Phantoms" terrorizing a coastal town, but their search is hindered by a local reverend and a horrifying curse.