Henry Frankenstein pieces together body parts in the hope of bringing a human-like creature to life. The mad scientist’s dreams are shattered by his monstrous creation awakening with rage to a world that hates and fears him.

The ultimate weapon, claimed to be safe for mankind, produces global side-effects including time slides and disappearances. The scientist behind the project and his car are zapped from the year 2031 to 1817 in Switzerland where he meets Dr. Victor Frankenstein, Mary Shelley and others.

The Wolf Man tries to warn a dimwitted porter that Dracula wants his brain for Frankenstein monster's body.

Frankenstein's unscrupulous colleague, Dr. Bohmer, plans to transplant Ygor's brain so he can rule the world using the monster's body, but the plan goes sour when he turns malevolent and goes on a rampage.

Blackmailing a young couple to assist with his horrific experiments the Baron, desperate for vital medical data, abducts a man from an insane asylum. On route the abductee dies and the Baron and his assistant transplant his brain into a corpse. The creature is tormented by a trapped soul in an alien shell and, after a visit to his wife...