
The game is centered around the Tunguska event and explores its speculative reasons. The main protagonist is a Russian girl living in Berlin, Nina Kalenkov, whose role is to uncover the mystery behind the disappearance of her father, who was in a special way involved in a secret scientific project concerning the Tunguska region in Siberia. At times, the role of the player-controlled character switches to Max Gruber, who is a German scientist, and Nina's father's colleague.