Less than two years after the assassination of her husband, Caroline Dupré joins Vanguard—an ultra-secret organization set up after the Cold War to counter the rise in unconventional global threats. Soon, she learns that she is the only operative suited for a crucial part of a mission to stop a plan hatched by a former Bulgarian intelligence officer—the Chameleon—to pass nuclear material to a rogue government seeking to develop nuclear weapons.
Time is short and the Chameleon is removing anyone and everything threatening his plan.
Can Caroline survive his wrath?
Can she stop him?