The Sea Devil Comes Ashore

Autumn 1944, East Prussia. The Germans are testing the «Sea Devil» — the only mini-submarine in the world. The approach of Soviet troops forces them to hide secret documentation in a cache. Twenty years later, West German intelligence recovers the sunken «Sea Devil» from the war and sends it with their agent nicknamed Gyrza to the Soviet shore, but KGB officers receive a signal from the border guards about the appearance of a strange object and begin an investigation. The situation is aggravated by the fact that there is a carefully concealed resident named Soloist operating on Soviet territory, who meets the arriving Gyrza from the submarine...