The 7 days of Halloween, day 4: Crossing into the dark

[hypatia-66.livejournal.com]

The show's writers need a Halloween theme for its characters. But as every author who has ever written about a character knows — they are liable to get away. Is it because they already exist, independent of writers?

https://archiveofourown.org/works/12531152

Originally written for spikesgirl, for the 2017 Halloween challenge and this image prompt.

A dark bridge, going where?