Something is lurking in the pipes. The narrator can’t quite come out and say what it is, can’t even name it, merely calling it it. It slithers out of drains, and hides in toilets, and it is drawn to places where the scent of sweat is heavy.
That’s one problem with it. The other is that no one other than the narrator seems to know that it exists. That doesn’t make it any less fiercesome — and indeed perhaps makes it even more! For how can one escape something that maybe isn’t even there?
This is a straight-up creepy-crawly horror story, ending on a “what if” cliff edge. I didn’t find it particularly scary myself, but for anyone who has their own fears of what lies in the pipes below, this would probably be quite an unsettling story to read.