This story is told by Sister, whose grandfather, Papa-Daddy, has gotten her a job as postmistress of the smallest post office in Mississippi. Sister is living peaceably with Papa-Daddy, her Uncle Rondo, and her Mama, when her younger sister, Stella-Rondo, returns home from an apparently failed marriage with a two-year-old daughter, Shirley T. Stella-Rondo had eloped with Mr. Whitaker, a traveling photographer, now nowhere to be seen.

No sooner does she move in then Stella-Rondo is back to her old tricks as the family favorite. When Sister questions the paternity of Shirley T (even noting how much she looks like Papa-Daddy), Stella-Rondo steadfastly maintains that the child is adopted. She punishes Sister by telling Papa-Daddy that Sister said he should trim his beard, which has been growing untouched by human scissors since it first appeared.

Later, Sister tries to fight back by saying that Shirley T is mute and mentally challenged, but (lo and behold!) she isn't. No matter how tall Stella-Rondo's tales are, the family believes her, and Sister remains the family scapegoat. Finally, to protest her dispossession, Sister rebels by moving away from home--to the local post office.