The film is based on real events when, in the 1970s, the deepest well in the world with a depth of more than 12 thousand meters was drilled in Murmansk Region for research purposes. During drilling, seismic sensors began to pick up strange sounds, an explosion occurred that led to mystical events.
A small research team went down below the surface to find out what secret the world's deepest borehole was hiding. What they have found turned out to be the greatest threat in history. And the future of humanity is in their hands.