The arrival of an unexpected guest at their uncle's 70th birthday party shatters the McCabe sisters' carefully constructed sense of normalcy. Cat, Fen, and Pip, having navigated a childhood defined by their mother's abandonment and their eccentric upbringing, find their mid-30s stability threatened by long-buried family secrets. As the sisters face individual identity crises, they must reconcile their pasts with their current domestic lives. The narrative explores the shifting dynamics between siblings and partners as they confront the fallout of these revelations.

This novel is characterized by its focus on the complexities of sisterhood and the lingering impact of childhood trauma on adult relationships. The narrative structure relies on the distinct personalities of the three sisters to drive the emotional stakes of the plot. Readers likely find the blend of humor and domestic drama to be a hallmark of the author's style in this genre. The story serves as an examination of how individuals redefine their sense of self when faced with the sudden collapse of their foundational family history.