In the near future, a psychologist named Kris Kelvin is sent to a space station orbiting the mysterious planet Solaris. The mission is to investigate strange phenomena that have led the crew to experience episodes of anguish and madness. Upon arrival, he realizes that the station is in a state of chaos: the astronauts have been affected by visions and shadows of their deceased loved ones, manifestations created by a life form on the planet that seems capable of reading the human mind.
As he tries to understand what is happening and help the survivors, Kelvin encounters a recurring figure: his late wife, Hari. Her appearance triggers an intense emotional struggle within Kris, who confronts his own feelings of guilt, uncertainty, and unrequited love. As the boundaries between reality and illusion blur, the relationship between Kris and Hari's manifestation becomes a profound questioning of the nature of love, pain, and memory.
What begins as a scientific mystery transforms into a philosophical meditation on human existence, exploring the connection between being and reality. As Kris delves deeper into his relationship with Hari, he is forced to confront his own inner demons and accept the most painful truths about his life. Ultimately, the journey to Solaris becomes a journey inward, where the answers are not always what one expects.