Reality is broken.

At first, it looks like a disease. An epidemic that spreads through no known means, driving its victims mad with memories of a life they never lived. But the force that's sweeping the world is no pathogen.

It's just the first shock wave, unleashed by a stunning discovery - and what's in jeopardy is not our minds but the very fabric of time itself. In New York City, Detective Barry Sutton is closing in on the truth - and in a remote laboratory, neuroscientist Helena Smith is unaware that she alone holds the key to this mystery...