#1 New York Times bestselling author Dean Koontz delivers a chilling novel of a traumatized woman and the terrifying place she'll never escape... She woke up in a hospital room, barely able to remember her own name. What secrets are hidden within Susan Thorton's mind? What terrible accident brought her here? And who are the four shadowy strangers--waiting, like death--in the darkened corridors?

One by one, Susan unlocks these mysteries. And step by step, she approaches the torment of her past--a single night of violence, waged by four young men...