Zoe Carter never saw it coming. As the glass front of her helicopter explodes and her leg is torn to pieces, she is tumbled into a nightmare in which her life is threatened by an unknown foe. Rescued from certain death in the frozen wastes of Antarctica, Zoe is determined to discover the identity of her assailant. With death snapping at her heels, Zoe pursues her enemy across three continents, seeking to uncover the deadly secret that is taking the lives of the people around her. How many lives will be lost before Zoe tracks down the murderer? And, when the trap is set, who will be caught?