Alex laughs a beat, almost bitter. "I think I was driving him crazy," he addresses the large computer, dead and off, in the next room. "Told me to stop following, to give him a minute to breathe."

And that was four days ago. The lack presses against his throat.

"Don't know how to handle loss," Alex says to Sarah, as he wouldn't to another. "Not my own and not another's. Never did."