Ciphers. Codes. Encryption. Passwords. Meet the best of the best elite Cryptanalysis Unit of the F.B.I. as they puzzle out the truth and protect all of us from those that would steal information in ways that can shatter the global community. But what happens to the Cryptanalysis Unit when one of their own goes missing? Is this a puzzle the puzzle-solvers can’t solve? And will this cipher reveal things about themselves?