In a socialist world in 2148, the Ederlezi Corporation undertakes a space mission to the Alpha Centauri star system. The corporation selects Milutin, a trained cosmonaut, but demands that he accepts Nimani, an android designed to respond to the cosmonaut’s desires and to monitor his performance on the ship. Milutin dislikes the idea as he has had poor experiences with women in the past, but implicitly accepts when he asks what she would look like.

Nimani is activated during the trip and Milutin experiments with her programmed scenarios. He finds her to be too artificial and submissive, unlike the human women he has experienced. Milutin gets bored and creates a scenario where she acts as a young first time lover, in which he rapes her. Milutin discovers that Nimani has a parallel operating system based on experiences shaped by interactions with the user, and that he can remove her pre-programmed constraints if he can get advanced access, which is denied by the ship’s onboard computer.

The two become romantically entwined, and after Milutin starts an argument scenario, he finds that she is beginning to act beyond her routines, and reads emotion into the interaction. Determined to find out if her feelings are real or programmed, he forces the ship into a tailspin, which makes the ship’s computer grant him advanced access.

He deletes the software embedded in her and rather than being grateful for freeing her from her limitations, she reacts negatively to his deletion of her root programming, and denies him sex. Milutin fades into a depression after Nimani rejects his advances. In order to maintain the mission objectives, Nimani tries to befriend Milutin and expresses her understanding of Milutin’s goal to give her free will and make her more like a human.

Realizing that she is the cause of his depression, she chooses to self-destruct to improve Milutin’s mental state. Milutin is surprised to see her crying prior to self-destruction, and is told by the ship’s computer her crying response prior to self-destruction was not pre-programmed but natural. He is devastated, but is told that he can save her by charging her internal battery, which requires a space walk and possible radiation poisoning. Milutin is able to charge the battery and successfully reactivate Nimani, but collapses prior to seeing Nimani wake. Nimani embraces and kisses Milutin as the ship continues onward. It is unclear whether Milutin survives.