1904, Pittsburgh: 1839 Wylie Avenue in the Hill District is the home of Aunt Ester, a 285-year-old former slave, who is a keeper of tradition and history for her people and a renowned cleanser of souls. The people who pass through her parlor and kitchen include Eli, Aunt Ester's protector; Black Mary, her housekeeper and protégé; Solly Two Kings, a former slave, conductor on the Underground Railroad and scout for the Union Army; Black Mary's brother, Caesar, a constable; Rutherford Selig, a peddler; and Citizen Barlow, a new arrival from down South who needs Aunt Ester to help him absolve the guilt and shame from a crime he's committed.