Dr. Chris Kelvin (George Clooney) is asked to investigate the unexplained behavior of a small group of scientists aboard the space station Prometheus, who have cut off all communication with Earth. Kelvin undertakes the journey after watching a communique from his close friend Gibarian, the mission's commander, who seeks Kelvin's help aboard the Prometheus for reasons Gibarian is unwilling - or unable - to explain. 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 paranoia, seemingly caused by the results of their examination of the planet Solaris.