Obsession is forever.

When seventeen-year-old Ariana runs away from her foster home she finds herself living with the Willens family and looking after Daniel, their twelve-year-old son.

Daniel is sensitive and brilliant—the most brilliant person Ariana has ever met. The two of them forge an extraordinary bond—and Ariana vows she will protect Daniel, now and forever.

But then their lives are torn apart by a horrifying tragedy. Forcibly separated, they do not see each other for ten years.

Now Daniel has come back into Ariana's life and the dark secrets they share begin to surface, threatening to destroy everything she has built for herself.

Can Ariana escape the ghosts of the past? Or does Daniel's reappearance mean that deeds long buried must now play out to their terrifying conclusion—plunging her into a waking nightmare from which there may be no escape?