The plot of "Frankenstein's Castle of Freaks" (also known as "Terror!" or "Monster of Frankenstein") is a rather convoluted and exploitative take on the Frankenstein myth, blending elements of horror, sexploitation, and a general sense of bizarre chaos.
Here's a breakdown of the main plot points:
* Count Frankenstein's Experiments: Count Frankenstein, portrayed as a somewhat lecherous and eccentric scientist, is busy in his castle conducting experiments to reanimate the dead. His latest subject is a Neanderthal man, named Goliath, who was lynched by villagers.
* The "Freaks" of the Castle: Frankenstein's household is populated by a collection of odd and depraved characters, including a dwarf named Genz, a hunchback, and other various "freaks" who assist him in his grave-robbing activities. Genz, in particular, is a necrophiliac and voyeur.
* Genz's Revenge and Ook: Genz is eventually cast out of the castle by Frankenstein for his perversions and leaving evidence of grave robbing. He then befriends another Neanderthal man roaming the countryside, whom he names Ook. Driven by revenge against Frankenstein, Genz teaches Ook to commit acts of rape and murder against local girls.
* The Villagers' Suspicions: The villagers, already wary of Frankenstein due to his strange activities and the missing bodies, become increasingly alarmed by the attacks. The local authorities, led by a prefect, begin investigating.
* Family and Love Triangles (of sorts): Frankenstein's daughter, Maria, returns home from university with her friend Krista. Frankenstein becomes attracted to Krista, who shares his interest in science, leading to some unsettling interactions.
* Monster Showdown: Genz eventually sneaks back into Frankenstein's lab and frees Goliath. This leads to a battle between Goliath and Ook, as well as general mayhem and killings within the castle.
* Climax and Resolution: The film culminates with the villagers forming an angry mob to confront Frankenstein. Ultimately, Frankenstein himself is killed by his creation, Goliath, who is then killed by the villagers.
In essence, the film is less about a coherent narrative and more about throwing together various sensational elements: multiple monsters, grave robbing, sexual deviancy, violence, and a "castle of freaks" as the title suggests.