Terror has a new sound . . .
and it comes from the darkest corners of James Patterson's imagination.
A gigantic explosion rips through a town in the shadow of Oregon's Mt Hood. The community is almost annihilated. The only survivors are young sisters Sophie and Tennant Riggin.
How they lived is a mystery.
But it's a mystery that a team of elite government investigators is bent on solving. Sent to research the fallout and the girls - why did only they survive? - they secretly hold conflicting objectives. For Dr Martha Chan, a psychologist who analyses large-scale medical emergencies: study them.