BioShock Infinite takes place in the airborne city of Columbia in 1912, where the player assumes the role of Booker DeWitt, a disgraced ex-Pinkerton agent. Booker has been given the job of finding a mysterious and powerful woman imprisoned in Columbia since birth named Elizabeth in order to wipe his debts away, and the story follows the unlikely duo as they journey to escape the flying city while discovering its twisted secrets.