Baron Frankenstein creates two "zombies" - one male, one female - planning to mate them in order to create a master race.

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...

After being resurrected by grave robbers, Larry Talbot searches for Dr. Frankenstein in the hopes of being cured of his lycanthropy. The mad scientist may turn out to be dead, but his monster is just waiting to be found…

One of the sons of late Dr. Henry Frankenstein finds his father's ghoulish creation in a coma and revives him, only to find out the monster is controlled by Ygor who is bent on revenge.