In the gleaming dystopian city of Glass, a totalitarian corporate regime watches over every citizen through a vast surveillance network called the Grid. Refusing to be monitored, a group of free-running couriers known as Runners live on the rooftops, ferrying secret messages and slipping past corporate security. Fresh out of prison, a skilled young Runner named Faith Connors returns to this hidden world and takes on a job that pulls her into a dangerous conspiracy. As she uncovers the corporations' plans, Faith is drawn into the fight to free the city from their control.