Sundial

Rob is terrified of her eldest daughter, Callie, who collects bones and whispers to imaginary friends. Fearing for her younger daughter's safety, Rob takes Callie back to Sundial, her childhood home in the Mojave Desert, to confront the darkness of her own past. But Callie is equally afraid of her mother, who has begun acting strangely and sharing disturbing family secrets. As the two isolate themselves in the desert, they both realize that only one of them might make it back alive.