The story is set in New York City and focuses on two sisters, Anna and Evelina Bunner, who run a small shop selling trinkets and knick-knacks. The sisters live a simple and contented life until the arrival of a mysterious young man named Mr. Haffen turns their world upside down. The sisters become embroiled in a series of events that challenge their assumptions about love, loyalty, and the true nature of happiness. The "Bunner Sisters" is a poignant tale about the power of relationships and the complexities of human nature.