This sequel to 'Frankenstein' (1931) begins with the work's author, Mary Shelley (Elsa Lanchester), revealing to Lords Byron and Shelley that there is still more of the tale to be told... Scientist Henry Frankenstein (Colin Clive) is recuperating from the events of the first film, believing his creation (Boris Karloff) to have been destroyed in a fire, when he receives a visit from his former mentor Dr Praetorius. Praetorius wishes Frankenstein to resume his experiments, but the latter refuses. When Praetorius discovers the monster, alive and now able to communicate, he uses it to kidnap Frankenstein's wife, thus blackmailing him into creating a mate. Followed by 'Son of Frankenstein' (1939).