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Iron Lung

Iron Lung

20268125 min
SkräckScience Fiction
Släppt
29 jan. 2026
Land
United States of America
Produktion
Markiplier Studios
I en postapokalyptisk framtid där en händelse som kallas ”The Quiet Rapture” fick alla kända stjärnor och beboeliga planeter i universum att försvinna, skickas en fånge ut för att söka efter ett blodhav som upptäckts på en ödslig måne, med hjälp av en liten ubåt med smeknamnet ”Iron Lung”.

About

Quick guide

Iron Lung: A solo submarine horror set in a bleak, post‑apocalyptic universe.

Iron Lung (2026) is a sci‑fi horror film directed by YouTuber Mark Fischbach. The story follows Simon, a convicted criminal sealed inside a single‑person submarine, as he is forced to traverse an alien moon’s blood‑filled ocean. Set against the backdrop of the Quiet Rapture—an event that erased all stars and planets—Simon’s journey is both a test of survival and a desperate search for data that may save the dwindling remnants of humanity. The film blends claustrophobic tension, atmospheric dread, and unsettling visual effects to keep viewers on edge without providing tidy explanations.

What to know

  • The Quiet Rapture erased all stars and planets, leaving only space‑station survivors.
  • Simon is a convict welded into the SM‑13 submarine and tasked with a death‑defying mission.
  • The moon AT‑5’s ocean is a blood‑filled alien environment.
  • The film is based on the 2022 indie horror game of the same name.
  • Markiplier stars, writes, directs, and funds the movie.
  • The runtime is 125 minutes.
  • The film relies on slow‑burn tension and atmospheric horror.
  • Over 80,000 gallons of fake blood were used for practical effects.

Watch if

Watch if you enjoy slow‑burn tension, atmospheric dread, and a story that rewards patience over jump scares. Fans of cosmic horror, submarine thrillers, or Markiplier’s fanbase will find this film intriguing.

Skip if

Skip if you prefer fast‑paced action, clear plot resolution, or mainstream Hollywood storytelling. The film’s deliberate pacing and open‑ended nature may leave some viewers wanting more closure.

dark tonehorror elementspsychological elementsslow burnsome goresuspensefuldialogue heavyinvestigation heavylanguage strong
Premise and Setting
Iron Lung opens on a bleak, post‑apocalyptic Earth where the Quiet Rapture has erased all stars and planets, leaving a few scattered space‑station survivors. The film follows Simon, a convicted criminal, as he is welded into the SM‑13 submarine—nicknamed the Iron Lung—and tasked with navigating the blood‑filled ocean of moon AT‑5 to retrieve a data‑black box that may save humanity. The setting is claustrophobic, with the sub’s sealed hull and limited oxygen adding palpable tension.
The Convict and the Submarine
Simon is a hardened convict whose past is shrouded in mystery, and his imprisonment on the submarine is both punishment and a chance for redemption. The sub’s cramped interior, its single porthole sealed in metal, and the reliance on an X‑ray camera to see beyond the hull force Simon to confront his fears. The crew’s voices through the intercom add an eerie psychological layer that drives the narrative.
The Quiet Rapture Explained
The Quiet Rapture is an event in the film’s lore where every star and planet vanished without warning, plunging humanity into isolation. It explains why only a handful of space‑stations survive and why the remaining humans are desperate to find resources. The disappearance creates a backdrop of existential dread that fuels the urgency of Simon’s mission and adds depth to the film’s bleak atmosphere.
The Blood Sea and Its Secrets
The ocean of blood on moon AT‑5 is a visceral, alien environment that challenges both physical and psychological limits. As Simon maps the sea, he encounters skeletal remains, mysterious creatures, and corrupted water that corrodes the sub’s systems. Audio logs from previous missions hint at a dark secret beneath the surface, but the film deliberately keeps many questions unanswered, heightening the sense of cosmic horror.
The Mission's Moral Weight
Simon’s task—to retrieve vital data and survive—raises questions about sacrifice and justice. He is offered freedom only if he completes a perilous journey that may lead to his death. Throughout the film, he must balance the responsibility to preserve humanity with his own desperate hope, creating a tense moral dilemma that propels his internal conflict.
Production and Design
The film’s low budget was offset by inventive practical effects, including over 80,000 gallons of fake blood that drenched the set. Markiplier’s self‑financing and hands‑on direction allowed a creative control that gave the movie an intimate feel. The claustrophobic set design and limited cast focused the tension on Simon’s experience, making the visual storytelling as much about atmosphere as plot.
Audience Reception
Iron Lung received mixed reviews, with critics noting its slow pace and lack of traditional scares. Nonetheless, it achieved impressive box‑office returns, buoyed by Markiplier’s massive YouTube following. Fans praised its atmospheric depth and the film’s ability to provoke discussion, while some viewers found its open‑ended narrative frustrating. Overall, it stands as a bold experiment in low‑budget, content‑creator‑driven filmmaking.

FAQ

50 Q&A
What is the film Iron Lung based on?
The film Iron Lung is based on a short story of the same name written by Robert Tinnell.
What is the significance of the SM-8 data?
The SM-8 data is crucial for the mission, providing vital information about the environment and potential discoveries on the moon's surface.
Who is Simon in Iron Lung?
Simon is the pilot of the Iron Lung submarine, tasked with a dangerous mission to explore a mysterious ocean on the moon.
What is the meaning of the last scene with the black box?
The last scene with the black box suggests that the mission's findings, and possibly Simon's fate, are being recorded or contained for future study.
What happened to the stars and planets?
The film doesn't explicitly state what happened to the stars and planets, but implies a cosmic event that led to the unique conditions on the moon.
Why is Simon a convict?
Simon is a convict because he committed a crime, but the specific details of his conviction are not fully explained.
Who stars in the movie Iron Lung?
The movie Iron Lung stars David Arquette and K. Harrison.
What is the ocean of blood on the moon?
The ocean of blood on the moon is a mysterious, viscous liquid that Simon must navigate in his submarine.
What is the black box in the movie?
The black box in the movie likely serves as a recording device for the mission's data and events.
What crime was Simon convicted of?
The movie does not specify the exact crime Simon was convicted of.
Does Simon die in Iron Lung?
Simon's fate at the end of the movie is ambiguous, but it is implied that he may not survive his mission.
Who wrote and directed Iron Lung?
Robert Tinnell wrote and directed the film Iron Lung.
What is the Iron Lung submarine?
The Iron Lung is a specialized submersible vehicle designed to withstand the extreme conditions of the moon's blood ocean.
What did Simon find on the ocean floor?
Simon finds strange and disturbing things on the ocean floor, including evidence of unknown life forms and unsettling structures.
What happens to Simon at the end of the movie?
At the end of the movie, Simon appears to be lost or consumed by the mission, with his fate uncertain.
Who is Ava in Iron Lung?
Ava is a character who communicates with Simon, guiding him during his mission.
What is the Quiet Rapture?
The film does not explain what the Quiet Rapture is.
Where does the movie Iron Lung take place?
The movie Iron Lung takes place on the moon, specifically within a vast ocean of blood.
Is the monster made of the research lead and assistant?
The film does not state that the monster is made of the research lead and assistant.
Why does Simon sacrifice himself?
Simon's actions at the end suggest a potential sacrifice to complete his mission or perhaps an unavoidable outcome of the dangerous environment.
Who are the main actors in Iron Lung?
The main actors in Iron Lung are David Arquette and K. Harrison.
What is the monster in Iron Lung?
The monster in Iron Lung is an unknown entity lurking within the blood ocean, posing a threat to Simon.
What is the X-ray camera used for?
The X-ray camera is used to see through the opaque blood ocean and observe the environment and any creatures within it.
What is the purpose of Simon's mission?
Simon's mission is to explore the mysterious blood ocean on the moon and gather scientific data.
Who are the research lead and assistant on the SM-8?
The research lead and assistant on the SM-8 are the individuals guiding Simon remotely during his mission.
What is the significance of the 'last tree' in the plot?
The last tree is a symbol of hope and a clue to understanding the blood ocean on the moon.
What is the significance of the 'filament station' mentioned?
The filament station is a place where Simon needs to go to get supplies or information for his mission.
What is the budget for the movie Iron Lung?
Information about the movie's budget is not publicly available.
What causes the heat inside the submarine?
The heat inside the submarine is caused by the intense pressure and the proximity to the blood ocean.
What is the overall plot of Iron Lung?
A man named Simon pilots a submarine called an 'Iron Lung' to explore a moon covered in blood, searching for something important.
How does Simon's physical state change during the movie?
Simon's physical state deteriorates as he experiences hallucinations and his body is affected by the strange environment.
What is the role of the 'Eden' group in the story?
The Eden group is a mysterious organization that sent Simon on this mission.
Is the tow ship in danger?
Yes, the tow ship is in danger due to the hostile environment and the events happening on the moon.
How much fake blood was used in the filming of Iron Lung?
Specific details on the amount of fake blood used are not publicly shared.
Did Markiplier want the sound design to be the main focus?
Markiplier emphasized the importance of sound design to create a scary and immersive atmosphere.
What is the running time of Iron Lung?
The movie Iron Lung has a running time of about 1 hour and 30 minutes.
What is the ending of Iron Lung?
The ending is ambiguous, with Simon seemingly lost or transformed within the blood ocean.
What was the 13th expedition trying to achieve?
The 13th expedition was trying to find a way to survive or understand the blood ocean.
What happened to Ava's vessel?
Ava's vessel was lost or destroyed in the blood ocean.
What is the designation of the barren moon?
The barren moon is designated as 'The Ocean'.
What is the 'Consolidation of Iron'?
The 'Consolidation of Iron' is not a clearly defined term in the movie's plot.
Did David mutiny on the tow ship?
David's actions suggest a potential mutiny or at least a desperate attempt to survive.
What are the symbiote-like things growing on the ship at the end?
These are unexplained, possibly alien, growths that appear on the submarine.
What does the mysterious woman's voice tell Simon?
The woman's voice gives Simon cryptic instructions and warnings.
Is Iron Lung suitable for all audiences?
No, Iron Lung is not suitable for all audiences due to its horror themes and intense content.
Where was Iron Lung filmed?
Iron Lung was primarily filmed on a soundstage with green screen technology.
What are some theories about the ending of Iron Lung?
Theories suggest Simon might have become part of the blood ocean, been taken by aliens, or achieved a twisted form of transcendence.
Does the movie explain the origin of the blood ocean?
The movie does not fully explain the origin of the blood ocean, leaving it mysterious.
How much money has Iron Lung grossed?
Box office gross information for Iron Lung is not readily available.
What is the genre of Iron Lung?
Iron Lung is a sci-fi horror film.

Skådespelare

Mark Fischbach
Mark Fischbach
Simon
Caroline Kaplan
Caroline Kaplan
Ava
Troy Baker
Troy Baker
David
Elsie Lovelock
Elsie Lovelock
SM-8 Research Lead / The Speaker (voice)
Elle LaMont
Elle LaMont
SM-8 Research Assistant / The Whisper (voice)
Mick Lauer
Mick Lauer
The Guy Who Told You to Cross the Wires (voice)
Dave Pettitt
Dave Pettitt
The Father
Holt Boggs
Holt Boggs
Eden Soldier
Isaac McKee
Isaac McKee
Young Simon
Roman Parsons Crow
Child of Eden
River Van Coleman Crow
Child of Eden
Townes Blaine Crow
Child of Eden