Burton served in the Marine Corps, in an elite unit of the First Haptic Reconnaissance. When he returned from the war, they didn’t find post-traumatic syndrome, but they did grant him a disability pension. Then he got a secret side job: testing a new computer game. But one day he needed to go to a neighboring city, so he asked his sister, Flynn, to take his place during the next beta-testing session. Nothing, he said, was complicated: you patrol the perimeter of a three-story high-rise on a quadcopter and drive away dragonfly paparazzi. But Flynn wasn’t prepared for what she’d see there—either it was just a game… or a real murder. And where was it—where exactly?