It’s the deadliest poison known to man.He’s the only one who knows its true power.She’s the only one who can stop the evil.The chase is on. . . .Number-one bestselling author Iris Johansen showcases one of her most fascinating characters yet, pitted against one of the most ruthless killers, in a novel that will make you forget to breathe. . . . Catherine Ling was abandoned on the streets of Hong Kong at age four. Schooled in the art of survival, she traded in the only commodity she had: information. As a teenager, she came under the tutelage of a mysterious man known only as Hu Chang---a skilled assassin and master poisoner. As a young woman, she was recruited by the CIA and now she is known as one of their most effective operatives.