The novel is a darkly comic exploration of the complexities of sibling rivalry and human relationships, centered around twin sisters, Abigail and Dorcas Mather. Despite their shared beginnings, the sisters' lives take divergent paths: Abigail becomes a reclusive writer, while Dorcas enjoys a more flamboyant lifestyle. Their bond is tested by a series of tragic and absurd events, including a murder at a family reunion. The story delves into themes of love, jealousy, and the search for personal identity, all while showcasing the protagonist's sharp wit and keen observations of the eccentric characters that surround her.

The 8481st greatest book of all time