A man in London tries to help a counter-espionage agent, but when the agent is killed and the man stands accused, he must go on the run to save himself and stop a spy ring that is trying to steal top-secret information.
Mary Shelley reveals the main characters of her novel survived: Baron Henry Frankenstein, goaded by an even madder scientist, builds his monster a mate.
After botanist Wilfred Glendon travels to Tibet in search of a rare flower, the Mariphasa, he returns to a London haunted by murders that can only be the work of bloodthirsty werewolves.