On Ash Wednesday, 2012, Sara Miles and her friends left their church buildings and carried ashes to the buzzing city streets: the crowded dollar stores, beauty shops, hospital waiting rooms, street corners and fast-food joints of her neighborhood. They marked the foreheads of neighbors and strangers, sharing blessings with waitresses and drunks, believers and doubters alike. CITY OF GOD narrates the events of the day in vivid detail, exploring the profound implications of touching strangers with a reminder of common mortality. As the story unfolds, Sara Miles also reflects on life in her city over the last two decades, where the people of God suffer and rejoice, building community amid the grit and beauty of this urban landscape.