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Plot summary

THX 1138 (1971) Plot Summary & Timeline

THX 1138 (1971) movie poster

THX 1138 is a 1971 sci-fi and drama film directed by George Lucas, running 1 hour 26 minutes. This page retells the whole story in 543 words (about 2 minutes to read) and covers 15 key events in order, 5 characters, where and when it is set and 3 themes. Looking for the cast, ratings and where to stream it? See the movie page for THX 1138.

to read the plot summary
2 min
key events in the timeline
15
characters profiled
5
themes explained
3
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THX 1138 (1971) movie poster
Released
Runtime
1h 26m
Director
George Lucas
Genres
Sci-Fi, Drama, Mystery
Original language
English
No spoilers

What Is THX 1138 About?

The premise of THX 1138 in 294 words, with nothing given away. The full story follows below.

In a stark, sterile metropolis where the state‑mandated chemicals keep every citizen in a calibrated calm, individuality is a crime and feeling is forbidden. Uniforms of identical gray, shaved heads, and the ever‑present hum of surveillance drones create an atmosphere that feels both clinical and oppressive. The society is built on the promise of safety and efficiency, yet beneath the polished surface lies a simmering tension between humanity and control.

THX 1138 works on the assembly lines that produce the very enforcers of this order, while LUH 3417 monitors the sprawling surveillance network from a control hub. Their lives intersect in the monotony of daily routines, but a quiet act of rebellion—rejecting the prescribed drugs that numb desire—sparks an unexpected connection. As they begin to experience love and a yearning for something beyond the sanctioned existence, the pair find themselves drawn into a fragile, shared hope for freedom.

The film’s tone is a blend of cold futurism and intimate defiance, painting the city as both a gleaming machine and a labyrinth of shadows. The omnipresent robotic enforcers move like silent judges, their black uniforms contrasting with the muted conformity of the populace. As the couple’s quiet dissent becomes known, they are marked as outlaws, forced to slip away from the ever‑watching eyes into the dim, hidden arteries that wind beneath the surface.

What follows is a tense, atmospheric pursuit through a world that feels both alien and painfully familiar. The subterranean corridors hint at a deeper reality, a place where the air is thicker with possibility and the very act of feeling becomes an act of resistance. In this stark backdrop, THX 1138 and LUH 3417 embody the restless spark of humanity daring to survive and to reclaim the right to be truly alive.

Full plot

What Happens in THX 1138?

The complete story of THX 1138, from the first scene to the last, in 543 words (about 2 minutes). Spoilers throughout.

Spoilers ahead

In a dystopian 21st century, society imposes strict restrictions: sexual intercourse and reproduction are forbidden, while the consumption of mind-altering substances is mandated to maintain control over the populace. Emotions, relationships, and even the very idea of family are deemed taboo. Citizens wear identical uniforms and have shaven heads to symbolize their enforced equality, contrasting with the police androids who don black uniforms and the robed monks. Instead of personal names, individuals are assigned a three-letter designation followed by a four-digit number, which is displayed on their identity badges at all times.

As the narrative unfolds, we meet SEN 5241 and LUH 3417, who are responsible for overseeing the city’s surveillance from their posts in central video control centers. LUH shares a living space with THX 1138, a factory worker engaged in the production of android police officers. At the story’s onset, THX, while enduring an incessant call for increased safety—celebrating a relatively low worker casualty rate of 195 compared to a rival factory’s 242—decides to leave his job.

On his journey home, THX stops at a confession booth, diligently murmuring prayers under the portrait of “OMM 0000”. A calming voice assures him, concluding each confession with, > “You are a true believer, blessings of the State, blessings of the masses. Work hard, increase production, prevent accidents, and be happy.”

Upon returning home, THX engages with holobroadcasts while under the influence of prescribed drugs and even utilizes a device for self-gratification. Meanwhile, LUH illicitly replaces THX’s drugs with pills she possesses, which leads to THX experiencing both physical discomfort and confusion. This act also sparks a romantic bond between them, culminating in their first physical intimacy.

Things take a turn when THX is assigned with SEN, who becomes his new roommate. However, a complaint against SEN regarding an illegal housing arrangement creates chaos in THX’s life. The absence of his usual drugs leads him to struggle during a critical work assignment, prompting a “mind lock” that heightens the risks at his job. When released from the mind lock, THX manages to rectify his performance, but it’s too late: both THX and LUH find themselves arrested.

In a brief moment of hope, THX and LUH reconnect, only for her to reveal she is pregnant. Their fates soon collide at THX’s trial, resulting in a prison sentence for both him and SEN. While many inmates exhibit no interest in escaping, THX and SEN ultimately discover a way out, subsequently joined by SRT 5752, a holographic character from the holobroadcasts.

As the trio attempts to flee, they become separated from SEN, who wanders into a child-rearing area but soon falls into the hands of police androids. In a desperate twist, THX and SRT steal vehicles but encounter disaster when SRT crashes into a concrete barrier during their escape. With police androids hot on their heels, THX races to the outskirts of the city and dives into a ventilation shaft, narrowly evading capture as Central Command orders the termination of pursuit due to budget constraints.

In a stunning revelation, it is unveiled that their entire city is situated underground. Finally emerging onto the surface, THX beholds the mesmerizing sunset, a sight that symbolizes freedom and the profound beauty of the world beyond the confines of their oppressive society.

Timeline

THX 1138 Timeline: Every Key Event in Order

15 key events in the order they happen, from “Strict Society Rules” to “Emerging into Freedom”. 11 events name a place, across 10 locations.

  1. 1

    Strict Society Rules

    In the 21st century, society enforces draconian laws where sexual intercourse and reproduction are outlawed. Citizens are mandated to consume mind-altering substances to maintain obedience and control, stripping away emotions and familial connections.

  2. 2

    Impersonal Identity

    Individuals in this dystopia are stripped of personal names and instead assigned a three-letter designation followed by a four-digit number. This system is indicative of the broader emphasis on enforced equality and dehumanization within society.

  3. 3

    Meet SEN 5241 and LUH 3417

    SEN 5241 and LUH 3417 work in central video control, overseeing the extensive surveillance of society. Their roles expose them to the oppressive dictates of their environment and hint at the emotional disconnect pervasive in their lives.

  4. 4

    THX 1138's Job Struggles

    THX 1138, a factory worker producing android police officers, finds himself suffocated by the demands of his job. Following a safety report celebrating their low casualty rates, he ultimately decides to leave his job in search of freedom.

    Where:Factory

  5. 5

    Confession Booth Encounter

    On his way home, THX stops at a confession booth where he engages in a ritual of murmuring prayers. The mechanical reassurance from the priest, OMM 0000, reinforces the indoctrination and conformity expected from citizens.

    Where:Confession Booth

  6. 6

    Romantic Connection

    Upon returning home, THX becomes under the influence of government-prescribed drugs and uses a self-gratification device. LUH, feeling a growing bond with THX, replaces his medication with her own pills, igniting their first intimate interaction.

    Where:THX's Home

  7. 7

    New Roommate Complications

    THX's life is disrupted when SEN is assigned as his new roommate. The situation escalates when a complaint arises about SEN's illegal housing, contributing to THX's mounting stress and further disconnect from the society's expectations.

    Where:THX's Home

  8. 8

    Collapse at Work

    THX struggles to meet work requirements without his usual drugs, leading to a 'mind lock' that jeopardizes his safety on the job. Despite overcoming this state, the damage is done, resulting in the arrest of both him and LUH.

    Where:Workplace

  9. 9

    THX and LUH's Arrest

    After a brief reunion, LUH reveals her pregnancy to THX, creating a tender yet perilous moment in their lives. Their subsequent trial results in a prison sentence, sealing their fates under an unforgiving regime.

    Where:Court

  10. 10

    Escape from Prison

    Despite apathy among fellow inmates, THX and SEN devise a plan to escape. They are joined by SRT 5752, a holographic character, as they navigate the complexities of freedom amidst an oppressive society.

    Where:Prison

Show the other 5 events of THX 1138
  1. 11

    Separation from SEN

    During their escape, THX, SRT, and SEN become separated. SEN wanders into a child-rearing area, where he unexpectedly encounters the police androids, intensifying the peril of their flight.

    Where:Child-Rearing Area

  2. 12

    Vehicle Crash

    In a desperate bid for freedom, THX and SRT steal vehicles, but chaos ensues when SRT crashes into a concrete barrier. This mishap exacerbates their escape efforts as the threat of capture closes in.

    Where:City Outskirts

  3. 13

    Ventilation Shaft Escape

    THX manages to evade police androids by fleeing into a ventilation shaft. Central Command, overwhelmed by budget constraints, issues a termination of the pursuit, granting THX a momentary reprieve.

    Where:Ventilation System

  4. 14

    Revelation of the Underground City

    As THX navigates through the ventilation system, he discovers that their entire city exists underground. This revelation highlights the manipulative nature of their society and the lack of awareness by its citizens.

  5. 15

    Emerging into Freedom

    Finally escaping the confines of the underground city, THX emerges to witness the breathtaking sunset above. This moment symbolizes not only his newfound freedom but also the beauty of the world that had been hidden from him.

    Where:Surface

Characters

Who Are the Main Characters in THX 1138?

5 characters, among them THX 1138, LUH 3417 and SEN 5241: who each one is and the part they play in the story.

  • T1

    THX 1138

    THX 1138 is a factory worker trapped in a repressive society that restricts individuality and emotion. He experiences a profound awakening as he navigates love and the consequences of defying societal norms, representing the struggle for personal freedom.

    • 👤 Protagonist
    • 💔 Rebellion
  • L3

    LUH 3417

    LUH 3417 serves as a pivotal character who introduces love and change into THX's life. By challenging the societal expectations around emotion and intimacy, she plays a crucial role in THX's awakening and descent into chaos as they attempt to reclaim their humanity.

    • 💞 Love Interest
    • 🌪️ Catalyst
  • S5

    SEN 5241

    SEN 5241 is an integral companion to THX, who faces his own challenges within the oppressive regime. His experiences are marked by confusion and the struggle for survival, making him a representation of the broader battle against conformity and control.

    • 🤝 Ally
    • 🚨 Survivor
  • O0

    OMM 0000

    OMM 0000 serves as a ghostly figure in THX's life, representing the blind adherence to the state’s doctrine. This character embodies the internalized belief system that perpetuates the citizens' subjugation and restriction of self-expression.

    • 👻 Authority Figure
    • 🔄 Cycle of Control
  • S5

    SRT 5752

    SRT 5752, a holographic character, becomes a part of THX's journey to freedom. Embodying the escapist fantasies promoted by holobroadcasts, SRT's character highlights the allure of rebellion against the oppressive environment.

    • 🖥️ Hologram
    • 🌈 Dreamer
Setting

Where and When Is THX 1138 Set?

THX 1138 is set in Underground City and Surface (21st century). Here is why the time and place matter to the story.

When

21st century

Set in the 21st century, the story depicts a dystopian future where humanity has surrendered to a regime that suppresses individuality, emotions, and even procreation. This period is marked by technological control over citizens' lives, reflecting a chilling vision of a society governed by fear and obedience.

Where

Underground City, Surface

The movie takes place in an underground city that enforces strict societal rules, characterized by uniformity and a lack of personal identity. Above this oppressive environment lies the surface, a place of freedom and natural beauty, symbolized by an awe-inspiring sunset that represents hope and liberation.

  • 🏙️ City
  • 🌅 Nature
Themes

What Are the Themes of THX 1138?

3 ideas the story keeps returning to, among them Control, Love and Escape.

  1. 01

    Control

    The theme of control is pervasive throughout THX 1138, showcasing how an authoritarian regime manipulates and restricts human behavior. The citizens are subjected to surveillance and are stripped of their identities, illustrating the lengths to which a society can go to maintain order and suppress dissent.

  2. 02

    Love

    Amidst the oppressive environment, the film explores the themes of love and intimacy. THX and LUH's evolving relationship represents a form of rebellion against societal norms, emphasizing the power of human connection in the face of oppression.

  3. 03

    Escape

    The narrative centers on the struggle for escape, both physically and metaphorically. As THX and his companions seek freedom from their underground confines, it highlights the innate human desire to break free from limitations and pursue autonomy.

Tone & mood

What Kind of Film Is THX 1138?

Dark in tone, with variable pacing and a moderate story, going by the plot summary.

Tone
Dark
Pacing
Variable
Story
Moderate
Intensity
High
Ending
Bittersweet

A coldly oppressive and claustrophobic sci-fi journey through a sterile dystopia, where the tension of being hunted is punctuated by the fleeting, somber beauty of discovering freedom at a great cost.

  • oppressive
  • claustrophobic
  • anxious
  • bleak
  • isolating
  • cold
  • dystopia
  • oppression
  • rebellion
  • loss of individuality

Content notes: drug control, psychological manipulation, imprisonment, loss of loved ones.

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FAQ

THX 1138 Plot Questions

5 quick answers about THX 1138, taken from the plot summary, character guide and setting on this page and the film’s credits.

What is THX 1138 about?

In a stark, sterile metropolis where the state‑mandated chemicals keep every citizen in a calibrated calm, individuality is a crime and feeling is forbidden.

Read the full plot summary

When and where does THX 1138 take place?

THX 1138 is set in Underground City and Surface (21st century). Set in the 21st century, the story depicts a dystopian future where humanity has surrendered to a regime that suppresses individuality, emotions, and even procreation.

The setting explained

Who are the main characters in THX 1138?

The story follows THX 1138, LUH 3417, SEN 5241 and OMM 0000; the character guide covers 5 characters in all.

All the characters

What are the main themes of THX 1138?

The summary picks out 3 themes: Control, Love and Escape.

The themes explained

Who directed THX 1138?

THX 1138 (1971) was directed by George Lucas and runs 1 hour 26 minutes.

George Lucas’s films

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