In 1983, during the last hot period of the Cold War, two Russian cosmonauts engaged in an orbital research mission experienced something inexplicable while returning to earth: they see something moving outside their ship. The spacecraft malfunctions on re-entry, and only one of the cosmonauts, Konstantin, survives, but it is clear that something is wrong with him. He is taken to an isolated military facility, where Dr. Tatyana Klimova, a young psychiatrist under review for her controversial approaches, is brought in, recruited by the officer in charge, Colonel Semiradov. She is not told the real reason for Konstantin’s quarantine, but she soon finds out that the cosmonaut brought back an extraterrestrial life-form inside his own body without knowing it himself. The creature comes out during the night, while its host is asleep. Colonel Semiradov reveals to her that she is here to determine how to separate Konstantin and the creature, since they seem to have developed a completely symbiotic relationship, with the creature living in the esophagus of the cosmonaut and benefiting from his nutrients, while Konstantin has made an impossible recovery from his injuries received when crash-landing. Sputnik 2020 full Movie
Tatyana confronts Konstantin by telling him she knows he has a child whom he has abandoned at an orphanage, implying he is not a national hero but a coward who does not care about his own son, with the purpose of stressing him. Thanks to this, she discovers that the creature is affected by hormone levels and that one of the videos she has been shown has been altered, which leads to her discovering a horrifying truth: the creature does not feed from whatever Konstantin eats, but rather eats live humans, and that the military has been feeding it prisoners. The creature shows itself to its victims in order to augment their fear, which makes the human brain release cortisol, from which the alien obtains its nutrition.