Two years ago, Beth Farrow turned her back on her three-year-old niece, Jenna, for just a few seconds. She disappeared without a trace.

How does a three-year-old go missing from a crowded summer fete without anyone noticing?

When Beth leaves the country to try and escape her guilt, someone sends her a photograph from an anonymous number. It's a photograph of Jenna. She's older, but Beth is sure it's her niece. She is determined to do what the police cannot: Find Jenna and bring her home.

But someone isn't pleased when Beth returns, and they will do what ever it takes to get rid of her. This time, for good.