The film explores the daily lives of Edith Bouvier Beale, known as "Big Edie," and her daughter, Edith 'Little Edie' Bouvier Beale, relatives of Jacqueline Kennedy Onassis. Living in a dilapidated mansion in East Hampton, New York, the reclusive pair exist in seclusion, surrounded by overgrown gardens and decaying interiors. Big Edie, once an aspiring singer, reminisces about her younger days while the spirited Little Edie dreams of a life beyond their confined world. The film delves into their past splendor, their artistic aspirations, and the factors that led them to this isolated existence.

Capturing moments of both tension and tenderness, the story reveals the complex dynamic between mother and daughter, where moments of affection are intertwined with bickering and frustration. Their conversations often drift into eccentric tales of lost ambitions and reflections on their unique family history. Onlookers are given a raw and unfiltered glimpse into their unconventional lifestyle, which starkly contrasts with the wealth and privilege associated with their famous family.