When the National Security Agency's invincible code-breaking machine encounters a mysterious code it cannot break the agency calls in its head cryptographer Susan Fletcher a brilliant beautiful mathematician. What she uncovers sends shock waves through the corridors of power. The NSA is being held hostage
- not by guns or bombs but by a code so complex that if released would cripple U.S. intelligence. Caught in an accelerating tempest of secrecy & lies Fletcher battles to save the agency she believes in. Betrayed on all sides she finds herself fighting not only for her country but for her life & in the end for the life of the man she loves...