Sal Frieland (Clive Owen) strolls down a city street, the anonymous faces in the crowds streaming past him instantly tagged with pop-up IDs. Frieland’s a cop in a future where every brain is connected to a central server, his hardwired Google Glass eyeballs giving him access not just to individuals’ data but everything they’ve seen and heard, all of it recorded for posterity and occasionally self-incrimination. Then, he’s called to a murder scene and finds the mind of the victim has been hacked––the culprit gone without leaving a digital footprint of any kind. Is this ghost in the machine a serial killer, an assassin, or something else?