Halloway housed many kinds of people: petty thieves, white-collar fallers, activists who had once made headlines. Among them, in Block C, cell 14, was Jules Marr. She’d been convicted for exposing a corporate bribe scheme; journalists called her a whistleblower, the prosecutors called her infractions messy and personal. Jules had a habit of being unusually observant. She watched guards watch the cameras. She knew the cadence of corrections the way a pianist knows scales. She noticed when the lights in the hallway flickered with the cameras, the micro-moment when a corridor existed both as space and as data stream.