The agent shoved Alice in the back, and she stumbled, almost fell. If she was going to escape, she needed to catch this guy off guard. An interconnecting stair led to another floor lined with glass-walled meeting rooms. At the far end, a locked door opened into a tight space filled with holding cells: metal bars in front of concrete boxes. It was empty, all prisoners shipped out. To one side, a cheap plastic table held an entry logger and old monitor. She slowed, let herself be pushed again, then staggered forward out of arms reach.