In chapter 8, Justine is tried, convicted, and finally executed for killing William, although she is innocent of the crime.
The Gothic is the dark and uncanny side of life. It is "unheimlich" or unhomelike. It is the world of the haunted house, of fog and eerie darkness, of the corpse. It is a once ordinary place that seems suddenly evil and unfamiliar.
At the end of chapter 8, the beautiful world Vincent and Elizabeth lived in has turned upside down. Some of details of this include their visit to Justine in her prison cell, where she is sitting on straw, her hands manacled and her head in her hands. This eerie and unsettling image is unheimlich, as the Frankensteins witness Justine in a grim and horrible setting in which they never expected to see her.
Vincent, who knows that the creature he created committed this crime, is living in a dark psychic space, feeling responsible for both the death of William and Justine. His life has turned inside out, and he feels as if a "worm" is eating out his heart, yet he is reluctant to tell the true story for fear of being considered mad.
The chapter ends with Justine's death and Gothic images of graves, landing on a reminder that Vincent unleashed this through his ghastly science:
I beheld those I loved spend vain sorrow upon the graves of William and Justine, the first hapless victims to my unhallowed arts.