When half-sisters Kat, Flora, and Lauren are unexpectedly summoned to Rock Point, their wild and remote Cornish summer home, it's not a welcome invitation. They haven't been back since that fateful summer twenty years ago—a summer they're desperate to forget. But when they arrive, it's clear they're not alone. Someone is lurking in the shadows, watching their every move. Someone who remembers exactly what they did.

When 15-year-old Margot and her three sisters arrive at Applecote Manor in June 1959, they expect a quiet English country summer. Instead they find their aunt and uncle still reeling from the disappearance of their daughter, Audrey, five years before. As the sisters become divided by new tensions when two handsome neighbors drop by, Margot finds herself drawn into the life Audrey left behind. When the summer takes a deadly turn, the girls must unite behind an unthinkable choice or find themselves torn apart forever.

During the languid days of the Christmas break, a group of 30-something friends from Oxford meets to welcome in the New Year together, a tradition they began as students 10 years ago. For this vacation, they’ve chosen an idyllic and isolated estate in the Scottish Highlands - the perfect place to get away and unwind by themselves. They arrive on December 30, just before a historic blizzard seals the lodge off from the outside world. Two days later, on New Year’s Day, one of them is dead.

In a sprawling mansion filled with peculiar treasures, January Scaller is a curiosity herself. As the ward of the wealthy Mr. Locke, she feels little different from the artifacts that decorate the halls: carefully maintained, largely ignored, and utterly out of place. Then she finds a strange book. A book that carries the scent of other worlds and tells a tale of secret doors, of love, adventure, and danger. Each page turn reveals impossible truths about the world, and January discovers a story increasingly entwined with her own.

Rare-book dealer Ashlyn Greer’s affinity for books extends beyond the intoxicating scent of old paper, ink, and leather. She can feel the echoes of the books’ previous owners—an emotional fingerprint only she can read. When Ashlyn discovers a pair of beautifully bound volumes that appear to have never been published, her gift quickly becomes an obsession. Not only is each inscribed with a startling incrimination, but the authors, Hemi and Belle, tell conflicting sides of a tragic romance.