When Whitney drops her teenage daughter, Amelia, off at a sleepover at a friend's house, she has no idea that her entire life is about to irrevocably change.

Because the next morning, when Whitney returns to pick up Amelia, an elderly woman answers the door. She's never seen or heard of Amelia and she lives in this house alone with her husband. It's every mother's worst nightmare, but this time there's no waking up from it.

Distraught and terrified, as Whitney tries to get to the bottom of her daughter's disappearance, she is forced to confront the secrets she thought she had outrun years before. With time running out to find Amelia, Whitney is forced to journey to the darkest parts of her history and piece together a puzzle that will be the difference between Amelia's life and her death.