Ah, this has that classic Seeds of Anxiety vibe.
Where it's not just, "there's a scary thing," or, "scary thing that 'gets' you if you look at it" it's, "scary thing that shows up somewhere you have to go, and it hasn't actually done anything to you yet, but also you don't have a way to deal with or even learn more about it, so you have to figure out how to coexist with it through trial and error.