Laurel Hawthorne has worked hard to create a good life for her family, determined not to raise her daughter in the subdued, secretive household that she herself grew up in. And everything is just fine until the night she is awoken by a ghost in her bedroom; the ghost of 14-year-old neighbour Molly, whose body is now floating, face-down and lifeless in Laurel's swimming pool . . . The whole town thinks it was an accident, but Laurel knows in her bones that there is something more sinister afoot. And that's when her perfect world begins to crumble. With the help of her eccentric sister, Laurel sets off on a mission to investigate what really happened to the girl who stopped swimming. But along the way she starts to uncover the truth about her family, and just what did happen in the woods all those years ago - on a day she has managed to blank out, until now . . .