A chemist for a cosmetics company and an ultramarathon runner, Emma Caldridge is en route from Miami to BogotÁ when her plane goes down in the mountains near the Venezuelan border. Thrown unhurt from the wreckage, she watches in horror as guerrillas drag the other passengers into the jungle. Stranded and alone in a deadly environment, Emma has no choice but to follow?and stumbles across Cameron Sumner, an injured government agent who was left behind to die.

As a Washington, D.C., task force races to the crash site in hopes of finding survivors, Emma and Cameron creep closer to a nightmare they may be powerless to prevent. But Emma is no ordinary woman?and she guards a secret both powerful and deadly that her adversaries would gleefully kill to possess.

And now she must run . . .