The action takes place in the late 1940s. A large-scale land-surveying research is underway in a remote area of Eastern Siberia. The work had almost been concluded when a wire arrives with the news of people disappearing in the locality of Yambuy. The expedition’s chief and radioman decide to go in search of the lost ones. The local Evenk hunters come to their aid. Many dangerous adventures lie in store for these daring people before they find the culprit – a man-eating bear.
 Olga Yenzak
старуха эвенкийка Лангара
 Rodna Yeshonov
старик эвенк Карарбах
 Yuri Zabarovsky
начальник геодезической партии Григорий Анисимович Федосеев
 Feliks Sergeyev
радист Павел
 Vladimir Zimin
эпизод
 Vladimir Kruglov
геодезист Цыбин
 Aleksandr Kavalerov
геодезист Степан
 Zinaida Pikunova
женщина эвенкийка Сулакикан