1758 year. Septennial war developed in complete force. Russians comparatively easily took East Prussia, inflicting the row of defeats to the emperor to Frederic. To trapped Кенигсберг the staff of army in the field moved under the command of favourite Elisabeth Petrovna, prince Carl Saxon. In Кенигсберге secret service of the Secret office at the head with adviser Лядащевым undertook a risky game against the English resident Сакромозо, deciding to use the princess Репнинскую, unfairly accused of attempt to poison an empress, for this purpose. The prince Nikita Оленев, appointed by a guardian Репнинской, is allowed on her searches and willy-nilly appears pulled in the fight of secret services. And certainly for help faithful naval friends-cadets - captain of cavalry Alexander Белов and captain Aleksej Корсак come him.