Portail des médiathèques du réseau Paris-Saclay

When the National Secruity Agency's invincible code-breaking machine encounters a mysterious code it cannot break, the agency calls in its head cryptographer, Susan Fetcher, a brillant, beautiful mathematician. What she uncovers is being held hostage, not by guns or bumbs, but by a code so complex that it released would cripple US intelligence. Caught in a accelerating tempest of secrecy and 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, and in the end, for the life of the man she loves...