My son called me a week before New Year’s Eve, and his voice was so hollow it made my blood run cold.

He said, ‘Don’t come, Dad. It’s too dangerous. If you walk through that door, they’ll k-ill you.’

Then the line went dead.

My name is Henry Thornton. I’m sixty-eight years old, and I live in a modest one-bedroom apartment in Hastings, Nebraska. Most folks around here know me as the quiet old man who drives a beat-up 1990 Ford pickup and always wears faded flannel shirts.