From an early age, Kate and her identical twin sister, Violet, knew that they were unlike everyone else. Kate and Vi were born with peculiar "senses" - innate psychic abilities concerning future events and other people's secrets. Though Vi embraced her visions, Kate did her best to hide them. Now, years later, their different paths have led them both back to their hometown of St. Louis. Vi has pursued an eccentric career as a psychic medium, while Kate, a devoted wife and mother, has settled down in the suburbs. But when an earthquake hits in the middle of the night, the normal life Kate has always wished for begins to shift.