In 1925, Alice Lind steps off a train in the rain-soaked coastal hamlet of Gordon Bay, Oregon. There, she expects to do nothing more difficult than administer IQ tests to a group of rural schoolchildren. A trained psychologist, Alice believes mysteries of the mind can be unlocked scientifically, but now her views are about to be challenged by one curious child.

Seven-year-old Janie O'Daire is a mathematical genius, which is surprising. But what is disturbing are the stories she tells: that her name was once Violet, she grew up in Kansas decades earlier, and she drowned at age nineteen. Alice delves into these stories, at first believing they’re no more than the product of the girl’s vast imagination. But, slowly, Alice comes to the realization that Janie might indeed be telling a strange truth.

Alice knows the investigation may endanger her already shaky professional reputation, and as a woman in a field dominated by men she has no room for mistakes. But she is unprepared for the ways it will illuminate terrifying mysteries within her own past, and in the process, irrevocably change her life.