Anna returns home after being institutionalized and tries to adapt to her new home situation. Her father Steven is now living with her late mother's nurse, Rachel Summers, whom Anna and her older sister Alex believe was responsible for their mother's death in a boathouse fire the previous year. Soon after her arrival, Anna begins to receive warnings from her late mother and three children who are always silent but point her to a tragedy that occurred years before in a nearby county. The evidence she and Alex gather all points to Rachel having a secret past and now living under an assumed identity. Just when she thinks she has all the evidence she needs against Rachel, new information emerges that puts earlier events in a different light.