IT BEGINS WITH A BLACKOUT.

All electrical power ceases to run. Even the sun seems a little dimmer. Cities come to a halt. And then their inhabitants vanish.

But a small, clandestine group of warriors has been preparing for this moment for centuries. Their hopes rest on two strangers, a thousand miles apart, who hold the keys to the world's salvation: Dylan Barnes, a martial arts instructor who teaches his students the art of inner balance but is plagued by shadows only he can see and voices muttering in a language only he can hear; and Lucy Devereau, a private investigator who earns a living by prying into the lives of others but is haunted by her own birthright-and the mystery of her true parents.

The world around them-our world-is slipping into darkness. Now, as fate and blood push them to the front lines of an extraordinary battle, Lucy and Dylan must stare into the face of something ancient, something impossible, something that has come to blot out the light-forever.