On Sunday night Janna Wade went to sleep and had the dream.

The black clouds roiling in the sky...

The isolated farmhouse beckoning in the distance...

The stairway leading into nothing...

The choking sobs coming from behind the door...

Open the door Janna. Don't be afraid, your screams will wake you.

When Janna does awaken, it's Tuesday—an entire day lost. Yet according to her friends she was at work, her e-mails were answered, her lunch dates were met, and her phone calls were returned. In fact, it was a day just like any other. Except Janna doesn't remember a thing. It's as if she wasn't there at all. And if Janna wasn't there, who was?

The answer comes with a stranger—a woman who knows what becomes of Janna's lost nights...who knows what Janna dreams...and who knows that from now on, Janna's every waking hour will be a nightmare.