In the late sixties, two nerdy field agents from the KGB science department are filming what may be their last minutes on this earth.
On June 30th 1908, an unknown explosion shattered a large area of forest near the Tunguska river in Siberia. Various studies have yielded many different theories about what caused the Armageddon-like event, ranging from an asteroid impact to a UFO crash.
Tunguska Diaries is based around an actual event en.wikipedia.org/wiki/Tunguska_event
The agents are most likely on a covert research expedition somewhere, in the forest near the Tunguska river to gather further knowledge about the massive explosion that happened in 1908 - but they are apparently not alone in the forest, an eerie unidentified flying object has been hovering over them since they arrived.
The agents are both equipped with super-8 cameras, so that they can document everything on their expedition. Due to the specifications of these old camera models, there is no recorded audio on the footage. The film journals from the two cameras have been digitalized and edited by the KGB. Furthermore the timecode in the lower left corner keeps track of which agent's point of view we are following. To make it all more watchable, the footage has been mixed with music, sound effects and intro-text.