Nice that you caught the reference to "Stalker". Altho there may be the movie "Stalker" actually it came from the story "Roadside Picnic" by Arkady and Boris Strugatsky written in the 1970's. It's something of a Sci-Fi cult classic. I'd call it more of a mystery/tragedy than a horror story (at least the book, which I have, never seen the movie).
Thanks for the chapter!