Short comic book adaptation of the gothic horror novel 'Carmilla' by J. S. Le Fanu.
"This story was to greatly influence Bram Stoker in writing Dracula (1897). It also served as the basis for several works in other media, such as Danish director Carl Theodor Dreyer's film Vampyr (1932); Hammer's film The Vampire Lovers (1970); Carmilla, a Canadian web series starring Natasha Negovanlis and Elise Bauman; and Carmilla (2019)"
https://en.wikipedia.org/wiki/In_a_Glass_Darkly
