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Lucid Dreams (2018) movie poster

Plot Summary

Lucid Dreams (2018) Plot Summary Explained

Release, runtime and language
2018 · 91 mins · Cantonese
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Starring
Tony Ho, Tats Lau Yee-Tat, Stephy Tang Lai-Yan, Maria Cordero, Albert Cheung Miu-Hau, Andrew Lam

This episodic film explores four distinct dreams of the director. One segment follows a man attempting to settle a debt through a staged wedding. Another focuses on a white-collar worker confronting challenges in both love and career, ultimately learning to relinquish his ego. A writer finds solace and connection when she reconnects with her mother. Finally, a driving instructor rediscovers his passion for music, inspired by visions of ethereal women.

On this page (5)
  1. 1 Where to watch
  2. 2 What happens: full plot
  3. 3 Plot questions answered
  4. 4 Movie threads
  5. 5 Every angle
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Full plot summary · contains spoilers

What Happens in Lucid Dreams: Full Plot Summary

The whole story of Lucid Dreams (2018) explained, from the opening scene to the final frame: every key event, every twist and what it all adds up to. Read it as a quick recap before the sequel, to check a scene you missed, or to finally understand what really happened.

Dae-ho is a dedicated young investigative journalist and a devoted single father who has built a reputation for his relentless pursuit of the truth. However, his commitment to exposing the dark secrets of corrupt politicians and powerful businessmen has earned him several dangerous enemies. His life takes a devastating turn when his young son is suddenly abducted. In a confusing twist, the kidnappers demand no ransom, leaving Dae-ho convinced that this is not a crime for money, but a calculated act of revenge orchestrated by one of the powerful figures he previously exposed in his reporting.

As time passes, the trail goes cold. Three long years pass without any significant breakthroughs or developments in the case, leaving the father in a state of perpetual grief and desperation. However, a glimmer of hope emerges when Dae-ho discovers a groundbreaking, experimental form of therapy. This innovative medical treatment allows mental patients and traumatized individuals to relive their most important and vivid memories through the power of lucid dreaming.

Dae-ho seeks the help of an old friend, So-hyeon, who is one of the skilled physicians administering this advanced therapy. Together, they embark on a psychological journey, diving deep into Dae-ho's subconscious to meticulously explore his memories of that fateful day when his son vanished. While navigating these vivid dreamscapes, they manage to uncover a new trail and hidden details that were previously overlooked in the waking world.

Seeing the potential of these discoveries, Detective Song—the officer who was originally responsible for the investigation three years prior—decides to rejoin the effort. He teams up with Dae-ho and So-hyeon to see if these subconscious revelations can be translated into tangible, legal evidence to solve the crime.

The investigation leads them to a prime suspect, but they hit a major roadblock: the man they believe is responsible has been in a coma, making it impossible to interrogate him. Refusing to give up, Dae-ho begins to track down a mysterious teenager who has consistently appeared within all of his lucid dreams. It is eventually revealed that this teenager has invented a revolutionary way to enter the dreams of others. In a final, desperate attempt to find his son, Dae-ho uses this technology to enter the subconscious mind of the comatose suspect, hoping to uncover the hidden truth and finally bring closure to the nightmare.

Last updated: October 11, 2026 at 16:41

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Plot questions answered

Lucid Dreams Plot Explained: Your Questions Answered

The questions people ask most about Lucid Dreams (2018): what happens in the confusing scenes, why the characters do what they do, the twists, hidden details and what the ending means. Each answer contains spoilers.

Q1

Why was Dae-ho's son kidnapped without a ransom demand?

The kidnappers never asked for money, which immediately tells Dae-ho that the abduction is not a financial crime. Since Dae-ho is an investigative journalist who has exposed several corrupt politicians and businessmen, he believes the kidnapping is an act of revenge by one of the powerful figures he previously targeted. The lack of ransom is the key clue that shifts the case from a typical missing-child investigation into a personal vendetta.

  • ransom
  • revenge
  • kidnapping
  • abduction
  • journalist
Q2

How does lucid dreaming therapy help Dae-ho find his missing son?

Lucid dream therapy allows traumatized individuals to consciously relive and explore their most vivid memories while asleep. Dae-ho uses this treatment with the help of his old friend So-hyeon, a physician who administers the therapy, to revisit the exact day his son disappeared. Within these reconstructed memories, he uncovers fragments and details that were missed during the original police investigation, creating an entirely new trail of evidence.

  • lucid dreaming
  • dream therapy
  • memory
  • investigation
  • So-hyeon
Q3

Who is the mysterious teenager that keeps appearing in Dae-ho's dreams?

The teenager is not a random product of Dae-ho's subconscious but a real person who has invented a revolutionary method to enter the dreams of other people. He appears across multiple dream sessions because he is somehow connected to the dream technology being used. Once Dae-ho tracks him down in the waking world, the teenager's invention becomes the key that allows him to access the mind of the comatose suspect.

Foreshadowing: The teenager's recurring presence in Dae-ho's dreams hints early on that he is more than a symbolic figure.

  • mysterious teenager
  • dream
  • subconscious
  • technology
Q4

Why is the prime suspect in a coma, and how does it affect the case?

After following the new trail uncovered through lucid dreaming, Dae-ho and his allies identify the man they believe orchestrated the abduction, only to discover he has been in a coma. Because he cannot be interrogated in the real world, traditional police methods become useless. This obstacle forces the investigation into an unconventional direction and ultimately drives Dae-ho to seek out the teenager who can enter other people's dreams.

  • coma
  • suspect
  • interrogation
  • investigation
Q5

How does Dae-ho enter the comatose suspect's dream?

Once Dae-ho realizes the suspect cannot be reached through normal questioning, he tracks down the mysterious teenager who has repeatedly appeared in his dreams. The teenager reveals that he has developed a way to enter the dreams of other people. Using this technology, Dae-ho dives into the subconscious of the comatose abductor to search for the hidden truth that only exists within his mind.

  • dream entry
  • comatose suspect
  • teenager
  • technology
Q6

Why does Detective Song rejoin the case after three years?

Detective Song was the officer originally assigned to investigate the abduction three years earlier, but the case went completely cold with no significant leads. When he learns that Dae-ho's lucid dreaming sessions have produced an entirely new trail of evidence, he decides the dream-based approach warrants another look. His return brings experienced investigative skills back into the effort and turns the breakthrough into a coordinated legal pursuit.

  • Detective Song
  • investigation
  • cold case
  • evidence
Q7

Why did Dae-ho make such dangerous enemies as a journalist?

Dae-ho built his career by relentlessly exposing the dark secrets of corrupt politicians and powerful businessmen. His investigations directly threatened figures with money, influence, and a vested reason to silence him. Because his reporting damaged their reputations and operations, several of these powerful individuals had both the motive and the means to retaliate, making his family a vulnerable target.

Foreshadowing: Early references to Dae-ho's fearless reporting establish the motive for the eventual abduction.

  • journalism
  • enemies
  • corruption
  • exposure
Q8

Why did the police investigation stall for three years with no answers?

Because the kidnappers demanded no ransom and left no traceable evidence, traditional investigative tools had nothing to work with. The lack of financial motive made it extremely difficult to profile suspects or follow leads, and the powerful people behind the crime were skilled at covering their tracks. As the years passed, Dae-ho was left in a state of perpetual grief with no new information to pursue until the dream therapy emerged.

  • three years
  • cold case
  • investigation
  • despair
Q9

Who is So-hyeon and what role does she play in the investigation?

So-hyeon is an old friend of Dae-ho who now works as a physician administering the experimental lucid dream therapy. When Dae-ho discovers the treatment, she agrees to guide him through the delicate process of reliving his memories of the abduction. Her medical expertise makes the dream sessions possible, and her personal connection to Dae-ho gives the investigation an emotional anchor as they navigate his subconscious together.

  • So-hyeon
  • physician
  • dream therapy
  • friend
Q10

What is the connection between Dae-ho's journalism and his son's abduction?

Dae-ho's work as an investigative journalist targeting corrupt politicians and powerful businessmen is the direct cause of his son's abduction. The kidnapping was not random violence but a calculated retaliation aimed at punishing Dae-ho for his reporting. This connection transforms the story from a simple missing-child case into a personal revenge plot, with the father's career serving as the catalyst for his family's tragedy.

  • journalism
  • abduction
  • revenge
  • connection
  • motive
Q11

Why does the teenager have the ability to enter other people's dreams?

The teenager is revealed to be the inventor of a revolutionary new technology that allows one person to enter the dreams of another. While the summary does not explain the full mechanics behind his invention, his ability is tied to the same dream-research breakthroughs that made So-hyeon's lucid dream therapy possible. His unique position as the creator of this technology makes him the only person capable of giving Dae-ho access to the comatose suspect's subconscious.

  • teenager
  • dream entering
  • ability
  • invention
Q12

What does Dae-ho hope to find inside the suspect's subconscious?

Inside the comatose suspect's dream, Dae-ho is searching for the hidden truth about his son's abduction that can never be uncovered in the waking world. Because the suspect cannot be questioned legally, his subconscious becomes the only remaining place where the secrets of the crime still exist. The dream journey represents Dae-ho's last and most desperate attempt to bring closure to a three-year-old nightmare.

  • subconscious
  • truth
  • son
  • closure
  • nightmare

Movie threads

More Movies Like Lucid Dreams, by Mood & Story

Curated lists built around what makes Lucid Dreams tick: the same mood, the same kind of story or the same emotional payoff. Each list explains why these movies belong together.

Dream-state investigations like in Lucid Dreams

Stories where the only path to truth runs through dreams and fractured minds. If you liked the lucid dreaming and subconscious investigation in Lucid Dreams, you'll love these psychological thrillers and mind-bending dramas. Movies like Lucid Dreams that use dreams, memory, and altered consciousness as tools to track down criminals, uncover conspiracies, or recover lost truths. Expect tense, complex stories where reality bends and every answer raises a new question.

  • dreamlike
  • psychological
  • paranoid
  • suspenseful
  • haunting
  • obsessive
  • Tone: tense, psychological
  • Pacing: variable, reality-shifting
Why these movies?

The story pattern: These stories typically begin with a desperate investigator or victim who has exhausted real-world options. The protagonist turns to unconventional methods—lucid dreaming technology, hypnotic regression, sensory deprivation, or shared consciousness experiments—to penetrate barriers that logic cannot break. The narrative jumps between waking investigation and surreal inner landscapes, treating the subconscious as a crime scene to be searched. Twists arise from what the dreamer actually finds versus what they fear, and resolutions often blur the line between discovery and delusion, leaving viewers to question what was real.

Why they belong together: Films in this thread share a fascination with the mind as both weapon and crime scene. They blend thriller tension with psychological or sci-fi elements, employ complex non-linear structures, and keep viewers guessing about what is real and what is imagined. The pacing tends to vary dramatically between quiet contemplative moments in waking life and chaotic, vivid sequences inside the mind. They typically carry heavy emotional weight as characters confront trauma, memory, and obsession, and they reward audiences who enjoy tracking multiple narrative layers at once.

Grief-fueled parent obsession like in Lucid Dreams

Heartbreaking stories where a parent's grief turns into relentless, consuming obsession. If you were moved by the grieving father's desperate search for his abducted son in Lucid Dreams, explore these powerful thrillers and dramas. Movies like Lucid Dreams where a parent's grief transforms into obsession, revenge, or an investigative crusade against powerful enemies. Expect heavy emotional weight, tense pacing, disturbing themes, and characters willing to sacrifice everything for answers or justice.

  • desperate
  • obsessive
  • haunting
  • grief-stricken
  • paranoid
  • revenge-driven
  • Tone: tense, bleak
  • Pacing: variable, grief-heavy
Why these movies?

The story pattern: The protagonist begins in a state of long-term grief, often years after the loss or abduction, having exhausted every official channel and mourning the years stolen from them. They discover an unconventional avenue for answers—whether through experimental technology, vigilantism, the criminal underworld, or directly confronting the perpetrators. The investigation spirals into a wider conspiracy, forcing the parent to navigate dangerous figures and make moral compromises that permanently reshape who they are. Along the way, grief is channeled into purpose but never fully resolved, leaving the emotional journey bleak even when breakthroughs occur.

Why they belong together: Movies in this thread share an unflinching focus on the devastation of losing a child and the psychological toll of pursuing justice outside the law. They are tense, often violent, and rely on heavy emotional weight rather than action spectacle. The pacing tends to be variable, with slow periods of grief and reflection punctuated by intense investigative or confrontational moments. They frequently involve conspiracies, powerful antagonists, and protagonists willing to risk their careers, safety, and sanity, creating stories that feel more like character studies of obsession than conventional thrillers.

Every angle

Lucid Dreams (2018) Explained: Plot, Timeline & Characters

Everything about Lucid Dreams in one place: what happens in the plot summary, the timeline in chronological order, the characters and meaning and a spoiler-free summary. What's After the Movie adds the cast, box office and post-credit scenes.

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