At 7:17 am on 30 June 1908, the largest explosion recorded in human history to date reverberated throughout our planet. The force of the explosion was two thousand times that of the Hiroshima bomb. A woodland area the size of Luxembourg was eradicated in the Siberian taiga. This incident is recorded in history books as the Tunguska catastrophe. To this day, internationally renowned scientists of various disciplines argue about the causes of this disastrous explosion. The documentary discusses the latest and most controversial insights of these leading scientists. It identifies the reasons why Tunguska has evolved into a phenomenon and points out the curious results produced by this mythical event in culture and economy.