Set during the 1930s, Clara Callan follows two sisters whose lives unfold along very different paths. Clara remains in their small Ontario town, working as a schoolteacher and caring for their ailing father, while her sister Nora leaves for New York City to pursue a career in radio and performance. Their relationship is sustained through letters and diary entries, revealing both their closeness and the growing distance between their experiences.

As Clara’s quiet, structured life is disrupted by unexpected relationships and personal challenges, Nora navigates the uncertainties of life in the city, chasing success while confronting loneliness and the realities behind her ambitions. Through their separate journeys, each sister faces choices that shape her sense of identity and independence.

Told through an intimate, epistolary form, the novel explores themes of family, ambition, and the search for fulfillment. Clara Callan is a reflective portrait of two women negotiating the possibilities and limitations of their time, where connection persists even as their lives move in different directions.