In a dystopian and oppressive future, society has been reduced to absolute control through the manipulation of emotions and desires. The lives of the citizens are monotonous and devoid of individualism, as they are forced to consume drugs that suppress their feelings and thoughts. One of the inhabitants, a man named THX 1138, begins to experience a disturbing sense of dissatisfaction. He starts to question the system and his own existence, leading him to develop a forbidden relationship with a woman, LUH 3417, who helps him discover the beauty of life and the freedom that has been stripped away from humanity.
As their love blossoms, so does the pressure from the system. Realizing that their defiant acts will not go unnoticed, the fugitive becomes a target of the totalitarian government that controls every aspect of its citizens' lives. His struggle for freedom turns into a game of cat and mouse, where every decision could mean the difference between life and death.
Trapped in a mechanical world devoid of humanity, THX 1138 must find a way to fight against oppression and regain control of his life. The film is a haunting journey into the search for identity and meaning in a society that has chosen to dehumanize its inhabitants, raising profound questions about freedom, love, and the nature of control.