This was a law firm before the apocalypse.
Carol pulls up in front of a building that used to be a law firm. She goes inside, and rattles a can of pens to see if any walkers are inside. There is no response, so Carol gathers some empty bottles from a recycling bin to use for water storage. Later that night, Carol finishes reading a magazine and blows out a candle. She goes to sleep with her pistol in her hand. The following day, Carol is at the window, setting up plastic bags to capture rain water. She spots a plume of smoke billowing up from the direction of the prison. Carol quickly gets in her station wagon and drives to the prison, presumably to see if her old group needs help.