In the autumn of 1960, Angie Glass is living an idyllic life in her Wisconsin hometown. At 21, she is married to charming, handsome Paul and has just given birth to a baby boy. But when Paul’s niece, Ruby, reports that her father, Henry, has committed suicide and that her mother, Silja, is missing, Angie and Paul drop everything and fly to the small upstate town of Stonekill, New York, to be by Ruby’s side. Angie thinks they’re coming to the rescue of Paul’s grief-stricken young niece, but Ruby is a composed and enigmatic 17-year-old who resists Angie’s attempts to nurture her. As Angie learns more about the complicated Glass family, she begins to question the very fabric of her own marriage.

Kitty Miller loves the bookshop she runs with her best friend, Frieda, and enjoys complete control over her day-to-day existence. But then the dreams begin. Katharyn Andersson is married to Lars, the love of her life, and they have beautiful children. It’s everything Kitty once believed she wanted. Convinced that these dreams are simply due to her overactive imagination, Kitty enjoys her nighttime forays into this alternate world. But with each visit, the more irresistibly real Katharyn’s life becomes.