What is the underlying plot?
The city of Mirror’s Edge is heavily monitored at all times, the almost dictatorial government watches any and all information as well as the citizens of the city. In order to get information from point to point without it being tracked or seen runners must be hired. Runners stick to the rooftops and avoid confrontation with authority at all times. The government would usually look past the runners and let them be, but now, after some unseen change, runners are criminals. Because of these changes Faith’s sister gets kidnapped. Mirror’s Edge follows Faith as she attempts to rescue her and outwit the government.