Alison has never been a fan of Christmas. But with it right around the corner and her husband busily decorating their cozy Vermont home, she has no choice but to face it. Then she gets the call. Mavis, Alison’s estranged mother, has been diagnosed with cancer and has only weeks to live. She wants to spend her remaining days with her daughter’s family. But Alison grew up with her mother’s alcoholism and violent abuse and is reluctant to unearth these traumatic memories.

1978: At her renowned treatment center in picturesque Vermont, the brilliant psychiatrist, Dr. Helen Hildreth, is acclaimed for her compassionate work with the mentally ill. But when she’s home with her cherished grandchildren, Vi and Eric, she’s just Gran—teaching them how to take care of their pets, preparing them home-cooked meals, providing them with care and attention and love.

In a quest for a simpler life, Helen and Nate have abandoned the comforts of suburbia to take up residence on 44 acres of rural land where they will begin the ultimate, aspirational do-it-yourself project: building the house of their dreams. When they discover that this beautiful property has a dark and violent past, Helen, a former history teacher, becomes consumed by the local legend of Hattie Breckenridge, a woman who lived and died there a century ago.

Once the thriving attraction of rural Vermont, the Tower Motel now stands in disrepair, alive only in the memories of Amy, Piper, and Piper's kid sister, Margot. The three played there as girls until the day their games uncovered something dark and twisted in the motel's past, something that ruined their friendship forever.

The summer of 1985 changes Reggie’s life. An awkward 13-year-old, she finds herself mixed up with the school outcasts. That same summer, a serial killer called Neptune begins kidnapping women. He leaves their severed hands on the police department steps and, five days later, displays their bodies around town. Just when Reggie needs her mother, Vera, the most, Vera’s hand is found on the steps. But after five days, there’s no body and Neptune disappears. Now, 25 years later, Reggie is a successful architect who has left her hometown and the horrific memories of that summer behind.