London, 1925. Glamorous medium Gloria Sutter made her fortune helping the bereaved contact loved ones killed during the Great War. Now she's been murdered at one of her own séances, after leaving a message requesting the help of her former friend and sole rival, Ellie Winter. Ellie doesn't contact the dead—at least, not anymore. She specializes in miraculously finding lost items. Still, she can't refuse the final request of the only other true psychic she has known. Now Ellie must delve into Gloria's secrets and plunge back into the world of hucksters, lowlifes, and fakes.

1920s England. Sarah Piper’s lonely, threadbare existence changes when her temporary agency sends her to assist an obsessed ghost hunter. Alistair Gellis—rich, handsome, and scarred by World War I—has been summoned to investigate the spirit of the nineteen-year-old maid Maddy Clare, who is said to haunt the barn where she committed suicide.

In 1919, Kitty Weekes, pretty, resourceful, and on the run, falsifies her background to obtain a nursing position at Portis House, a remote hospital for soldiers left shell-shocked by the horrors of the Great War. Hiding the shame of their mental instability in what was once a magnificent private estate, the patients suffer from nervous attacks and tormenting dreams. But something more is going on at Portis House—its plaster is crumbling, its plumbing makes eerie noises, and strange breaths of cold waft through the empty rooms. 

Is there something wrong with Ginette Cox? It’s what everyone seems to think. When a doctor suggests that what she might need is less excitement, she packs up and moves from New York City to a house in suburban NY: 19 Howard Ave. The town offers Ginette little in the way of entertainment in 1959, but at least she has interesting neighbors. Whether it’s the little girl with her doll or the couple and their mother-in-law, Ginette watches them from her window and makes up names and stories for them.

West Hall, Vermont, has always been a town of strange disappearances and old legends. The most mysterious is that of Sara Harrison Shea, who, in 1908, was found dead in the field behind her house just months after the tragic death of her daughter, Gertie. Now, in present day, 19-year-old Ruthie lives in Sara's farmhouse with her mother, Alice, and her younger sister, Fawn. Alice has always insisted that they live off the grid, a decision that suddenly proves perilous when Ruthie wakes up one morning to find that Alice has vanished without a trace. Searching for clues, she is startled to find a copy of Sara Harrison Shea's diary....