In picturesque Moonlight Cove, California, inexplicable deaths occur and spine-tingling terror descends to this "edge of paradise." Growing numbers of residents harbor a secret so dark it is sure to cost even more lives.

Tessa Lockland comes to town to probe her sister's seemingly unprompted suicide. Independent and clever, she meets up with Sam Booker, an undercover FBI agent sent to Moonlight Cove to discover the truth behind the mysterious deaths. They meet Harry Talbot, a wheelchair-bound veteran, who has seen things from his window that he was not meant to see. Together they begin to understand the depth of evil in Moonlight Cove. Chrissie Foster, a resourceful eleven-year-old, running from her parents who have suddenly changed and in whom darkness dwells, joins them. Together they make a stand against darkness and terror.

The books of Dean Koontz are published in 38 languages, and worldwide sales top 400 million copies. Eleven of his novels have risen to number one on the New York Times hardcover bestseller list, and several have been adapted into feature films and TV miniseries. Dean and Gerda Koontz live in southern California with their golden retriever, Anna, grand-niece of the famous and beloved Trixie.