The year is 1967. Malcolm Pomerantz is twelve, geeky and socially awkward, while his seriously bright sister, Amalia, is spirited and beautiful. Each is the other's best friend, united by a boundless interest in the world beyond their dysfunctional parents' unhappy home. But even the troubled Pomerantz household will seem to be a haven compared to the house next door, after an enigmatic and very secretive new neighbor takes up residence in the darkest hours of the night.

Grady Adams lives a simple, solitary life deep in the Colorado mountains. Here the 35-year-old carpenter works out of a converted barn, crafting exquisite one-of-a-kind furniture. There's little about this strong yet gentle man to suggest the experiences that have alienated him from the contemporary world. But that is about to change.

There once was a killer who knew the night, its secrets and rhythms. How to hide within its shadows. When to hunt. He roamed from town to town, city to city, choosing his prey for their beauty and innocence. His cruelties were infinite, his humanity long since forfeit. But still... he had not yet discovered how to make his special mark among monsters, how to come fully alive as Death. This is the story of how he learned those things, and of what we might do to ensure that he does not visit us.

With each and every new novel, Dean Koontz raises the stakes, and the pulse rate, higher than any other author. Now, in what may be his most suspenseful and heartfelt novel ever, he brings us the story of an ordinary man whose extraordinary commitment to his wife will take him on a harrowing journey of adventure, sacrifice, and redemption to the mystery of love itself, and to a showdown with the darkness that would destroy it forever.

In the midst of a raging blizzard, lightning struck on the night Laura Shane was born. And a mysterious blond-haired stranger showed up just in time to save her from dying. Years later, in the wake of another storm, Laura will be saved again. For someone is watching over her. Is he the guardian angel he seems? The devil in disguise? Or the master of a haunting destiny beyond all time and space?