So, the book pretty much tells the story of some guy who goes batshit and starts murdering people. There's these three people right, Mary, Phil and Todd, and they're trapped in the slaughterhouse. The killer's right outside and they need to find a way out. It gets really tense at times, and at the end he finds a way in and kills Phil and Mary. Todd runs like hell to escape, but the killer looks like he's gonna catch him. Then all of a sudden Mary wakes up and realises it was all a dream. She gets out of bed, only to be struck by a large steel spear, which pins her to the wall. She slowly bleeds to death, wondering what the hell happened.
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This is like, my favourite story. I've read it literally dozens of times.