They say if you pass by on the right night of the year, you'll hear the devil whisper your name . . .

Once upon a soft, summer night in a small New England town, a 12-year-old girl named Lisa went into the woods behind her house and never came out again. Before she disappeared, she told her little brother Sam about a door—hidden among the ruins of an old town long forgotten—that led to a magical place. A place where she would meet Teilo, the King of the Fairies, and become his queen.

Sam didn't believe in fairies, ghosts, or anything supernatural back then, and now, 15 years later, he still doesn't. It's one of the many things that his girlfriend, Phoebe, loves about this practical, sensible man. Sam doesn't have bad dreams, doesn't avoid the shadows, and does not fear the dark. Instead, he helps her ignore her own dark nightmares.

But a series of eerie occurrences—beginning with a mysterious phone call—begins to challenge Sam's hard-headed realism. Could there be a world beyond their own and is Lisa somehow a part of it? As events spin out of control, the couple finds themselves falling deeper into a vortex of evil and terror. And suddenly Sam is reminded of a terrible promise he made years ago . . . a promise that could destroy them all.