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.

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.

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.

In 1977, Claire Lake, Oregon, was shaken by the Lady Killer Murders: Two men, seemingly randomly, were murdered with the same gun, with strange notes left behind. Beth Greer was the perfect suspect - a rich, eccentric 23-year-old woman, seen fleeing one of the crimes. But she was acquitted, and she retreated to the isolation of her mansion.

July 1995. April and Eddie have taken a wrong turn. They’re looking for the small resort town where they plan to spend their honeymoon. When they spot what appears to a lone hitchhiker along the deserted road, they stop to help. But not long after the hitchhiker gets into their car, they see the blood seeping from her jacket and a truck barreling down Atticus Line after them.