The clinical psychologist Dr. Chris Kelvin is approached by emissaries for DBA, a corporation operating a space station orbiting the planet Solaris, who relay a message sent from his scientist friend Dr. Gibarian. Gibarian requests that Kelvin come to the station to help understand an unusual phenomenon but is unwilling to explain more. DBA is unsure how to proceed, as the mission to study Solaris has been sidetracked and none of the astronauts want to return home. In addition, DBA has lost contact with the security patrol recently dispatched to the station. Kelvin agrees to a solo mission to Solaris as a last attempt to bring the crew home safely.