Years after the events of the last film Baron Wolf von Frankenstein (Basil Rathbone), son of Henry Frankenstein (creator of the Monster), relocates his wife Elsa (Josephine Hutchinson) and their young son Peter (Donnie Dunagan) to the family castle. Wolf wants to redeem his father's reputation, but finds that such a feat will be harder than he thought after he encounters hostility from the villagers. Aside from his family, Wolf's only friend is the local policeman Inspector Krogh (Lionel Atwill) who bears an artificial arm, his real arm having been "ripped out by the roots" in an encounter with the Monster as a child.
While investigating his father's castle, Wolf meets Ygor (BÃ©la Lugosi), a demented blacksmith who has survived a hanging for graverobbing and has a deformed neck as a result. Wolf finds the Monster's comatose body in the crypt where his grandfather and father were buried; his father's sarcophagus bears the phrase "Henrich von Frankenstein: Maker of Monsters" written in chalk. He decides to revive the Monster to prove his father was right, and to restore honor to his family. Wolf uses the torch to scratch out the word "Monsters" on the casket and write "Men" beside it. When the Monster (Boris Karloff) is revived, it only responds to Ygor's commands and commits a series of murders; the victims were all jurors at Ygor's trial. Wolf discovers this and confronts Ygor. Wolf shoots Ygor and apparently kills him. The Monster abducts Wolf's son as revenge, but cannot bring himself to kill the child. Krogh and Wolf pursue the Monster to the nearby laboratory, where a struggle ensues, during which the Monster tears out Krogh's false arm. Wolf swings on a rope and knocks the Monster into a molten sulphur pit under the laboratory, saving his son.
The film ends with the village turning out to cheer the Frankenstein family as they leave by train. We also see Krogh has a new false arm. Wolf leaves the keys to Frankenstein's Castle to the villagers.
What did Wolf write on the casket?
Men