Deranged scientist, Gustav Niemann, escapes from prison and overtakes the director of a traveling chamber of horrors, soon reviving the infamous Count Dracula, the frozen Frankenstein Monster, and the Wolf…

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…

An obsessed scientist conducts profane experiments in evolution, eventually establishing himself as the self-styled demigod to a race of mutated, half-human abominations.