In order to fulfill his father's last will, the Cossack Aljoha goes abroad to worship the Virgin Mary. The road takes him through the Ottoman Empire, where he is captured and becomes the janissary Ali. However, nothing can stop a free Cossack. Aljoha does not lose hope that he will regain his freedom, fulfill his father's will, meet love and return to his homeland.

Moscow, 1956. Four women who are tied by the military past: work in the special department of the GRU, 11 years later converge again to conduct investigations and help the investigating authorities in especially complicated cases. With phenomenal analytical skills, Irina, Anna, Sophia and Katerina risk themselves, as well as the well-being of their own families, in order to get on the trail of criminals who threaten the lives of ordinary people and the whole country. Cipher is a Russian television detective based on the British mini-series The Bletchley Circle. The working title of the series is "The Ciphers". The series is produced by Sony Pictures Television, Lean-M and the Pobeda Production Association. The premiere of the television series took place on March 11, 2019 on Channel One.