Maisie Thomas spends every summer at Grange House, a hotel on the coast of Maine ruled by the elegant Miss Grange. In 1896, when Maisie turns 17, her visit marks a turning point. On the morning after her arrival, local fishermen make a gruesome discovery: drowned lovers, found clasped in each other's arms. It's only the first in a series of events that casts a shadow over Maisie's summer. As she considers the attentions of two very different young men, Maisie also falls under the gaze of Miss Grange, who begins to tell her disturbing stories of her past.

In her twenties, Belle da Costa Greene is hired by J. P. Morgan to curate a collection of rare manuscripts, books, and artwork for his newly built Pierpont Morgan Library. Belle becomes a fixture in New York City society and one of the most powerful people in the art and book world, known for her impeccable taste and shrewd negotiating for critical works as she helps create a world-class collection.

Sage Winters always knew her sister was a little different even though they were identical twins. They loved the same things and shared a deep understanding, but Rosemary—awake to every emotion, easily moved to joy or tears—seemed to need more protection from the world. Six years after Rosemary's death from pneumonia, Sage, now sixteen, still misses her deeply. Their mother perished in a car crash, and Sage's stepfather, Alan, resents being burdened by a responsibility he never wanted. 

Violette Toussaint is the caretaker at a cemetery in a small town in Bourgogne. Casual mourners, regular visitors, and sundry colleagues - gravediggers, groundskeepers, and a priest - visit her to warm themselves in her lodge, where laughter, companionship, and occasional tears mix with the coffee she offers them. Her life is lived to the rhythms of their funny, moving confidences. But her routine is disrupted by the arrival of the local police chief, who insists on scattering the ashes of his recently deceased mother on the gravesite of a complete stranger.

Spanning the years 1900 to 1977, The Covenant of Water is set in Kerala, on South India’s Malabar Coast, and follows three generations of a family that suffers a peculiar affliction: in every generation, at least one person dies by drowning—and in Kerala, water is everywhere. At the turn of the century, a twelve-year-old girl from Kerala’s long-existing Christian community, grieving the death of her father, is sent by boat to her wedding, where she will meet her forty-year-old husband for the first time.