From the outside, Essie’s life looks idyllic: a loving husband, a beautiful house in a good neighborhood, and a nearby mother who dotes on her grandchildren. But few of Essie’s friends know her secret shame: that in a moment of maternal despair, she once walked away from her newborn, asleep in her carriage in a park. Disaster was avoided, and Essie got better, but she still fears what lurks inside her, even as her daughter gets older and she has a second baby.

Fern Castle works in her local library. She has dinner with her twin sister, Rose, three nights a week. And she avoids crowds, bright lights, and loud noises as much as possible. Fern has a carefully structured life, and disrupting her routine can be...dangerous. When Rose discovers that she cannot get pregnant, Fern sees her chance to pay her sister back for everything Rose has done for her. Fern can have a baby for Rose. She just needs to find a father. Simple.

Anna Forster, in the early stages of Alzheimer's disease at only 38 years old, knows that her family is doing what they believe to be best when they take her to Rosalind House, an assisted-living facility. She also knows there's just one another resident her age, Luke. What she does not expect is the love that blossoms between her and Luke even as she resists her new life at Rosalind House. As her disease steals more and more of her memory, Anna fights to hold on to what she knows, including her relationship with Luke.

Stephen Aston is getting married again. The only problem is, he's still married to his first wife, even though she is in a care facility for dementia. But he'll take care of that easily, by divorcing her—even if his adult daughters protest. Tully and Rachel Aston look upon Heather as nothing but an interloper. Heather is the same age as Rachel and even younger than Tully. Clearly she's a gold digger and after their father's money. Heather has secrets that she's keeping close, and reasons of her own for wanting to marry Stephen.

From the moment Lucy met her husband's mother, Diana, she was kept at arm's length. Diana was exquisitely polite and properly friendly, but Lucy knew she was not what Diana envisioned. That was five years ago. Now, Diana is dead, a suicide note found near her body. Diana claims she no longer wanted to live because of a battle with cancer. But the autopsy finds no cancer. The autopsy does find traces of poison and evidence of suffocation.