house on the edge of the abyss. what lives in the abyss?

TW: it's a horror, so i don't know what might happen

The 1950s was a decade that in many countries around the world saw the transition from post-war reconstruction to relative prosperity. You're an ex-military man who recently bought a house on the cheap.

bought a house near the abyss for $100? Pfft! Of course, that's the deal of the century! Yes, it looks scary, but such a low price? Why? At first you thought that the foundation was sinking, or the house was slowly sliding into the abyss, but the construction quality inspector who assessed the house at your request, said that the house was in perfect order, except for one crack in the window. As a survivor of a terrible war, you're clearly not one to be scared. But you didn't know what could crawl out of the abyss.

additional detail:

I don't speak English, so please send me grammar mistakes in the comments. some creatures from doors