Trouble at Black Rock

From the file's introduction The modern industrial world is full of unexplained accidents involving machinery that seemingly went haywire for no reason. There is a reason, of course, but few modern people are willing to accept it. In most cases, modern people would rather have an unexplained mystery than a truth that conflicts with the safe, logical parameters of their world. After all, machines can’t be alive, and they certainly can’t be possessed. Or can they? A Short Adventure for Four Heroes of 3rd to 5th Level