A small funny brown bear paced joyfully in the woods. More recently, he did not leave his mother at all and now he came to the lakeon his own. Butwhat he saw there amazed him. Now he has to deal with his own reflection in the water, which can be both bad and friendly.

The beginning of the 1960s, a period of aggravation of the confrontation between the USSR and the USA. In the most difficult weather conditions and with malfunctions on board, the first Soviet nuclear submarine K-3 sets off for a hike under the ice of the Arctic Ocean in order to surface exactly at the North Pole.