When Katie was 12 years old, she suddenly disappeared. A police search led to nothing. Five years later, Katie is standing outside her house.
Five years later a 17-year-old Katie turns up at Janet's doorstep. The overwhelming joy is short lived, though, as Katie is suffering from severe trauma and unable to account for her absence. What's worse, after mysterious strangers begin following them, Janet becomes convinced the kidnappers have also returned for Katie.