Diego, an old colleague of freelance operative Daria Gibron, had been a bodyguard in Florence, protecting an engineer and her invention, when they were attacked by a highly trained paramilitary group. He alone escaped, and the White Scorpions, a Serbian mercenary group known for their indiscriminate violence, are now after him. At the same time, a small group of disgraced CIA agents have been waiting for their chance to exact revenge on the person they blame for their discharge --- Daria Gibron.

A former Shin-Bet agent now in exile in the U.S. and under the protection of the FBI, Daria Gibron works primarily as an interpreter but still can't resist the occasional freelance job as an operative. En route to an impromptu meeting with an old contact from her days in the Israeli Secret Service, Daria learns that she's about to walk into an ambush. Someone has linked her to a much sought-after terrorist, and now all the resources of the U.S. intelligence community are being marshaled against her.

Three NTSB experts --- people brought in to help investigate whenever a plane goes down --- find themselves victims and witnesses rather than investigators when the plane they are on crashes.

Whenever a plane goes down in the U.S., a "Go Team" made up of experts is assembled by the National Transportation Safety Board to investigate. Those people --- each of them a leading expert in a specific area --- are known informally as "Crashers."