Cecilia Fitzpatrick's life is an open book of success, community standing, and family bliss. But a secret letter from her husband, meant to be read posthumously, surfaces and Cecilia's perfect world unravels. The letter reveals a sinister truth that could devastate not just her life, but of those around her, including Rachel and Tess, who are mere acquaintances. As the fabric of their lives becomes intertwined, they must confront the impact of the secret and the hard choices that lie ahead. Liane Moriarty weaves a tale of suspense and moral complexity, questioning how well we know the people we love and the lengths we are willing to go to protect our relationships.