An expedition group led by Professor Shestakov arrives in one of the regions of Siberia to search for diamonds. The research begins with a dramatic event: The expedition leader dies suddenly. However, the geologists decide to continue the difficult, dangerous hike along the taiga "diamond trail".
Natalya Velichko
Sergei Polezhayev
Nina Ilyina
Stasys Pytronaitis
Sergei Ivanov
