Set sometime in the future, the film begins when Dr. Chris Kelvin is asked to investigate the unexplained behavior of key scientists on the space station Prometheus and to discover why they have cut off all communication with Earth.
Kelvin undertakes the journey after watching the last communiqué from his close friend Gibarian, the mission’s commander. Transmitted six months earlier, the disjointed video journal shows a clearly disillusioned and despairing man. Keenly aware that his opinion will decide the fate of the orbital station, Kelvin is shocked by what he finds upon his arrival. Gibarian has committed suicide and the two remaining scientists are exhibiting signs of extreme stress and terror, seemingly caused by the results of their examination of the planet Solaris.
As he begins to track down the reasons for the distress aboard the Prometheus, Kelvin, too, falls victim to the unique world’s mysteries, as well as an erotic obsession with someone he thought he left behind.