Oxygen

Oxygen

Year: 2021

Runtime: 100 min

Language: French

Director: Alexandre Aja

Sci-FiDramaThrillerFantasy

A young woman awakens alone in a cryogenic pod, suffering from amnesia and unable to recall who she is or how she got there. With her oxygen supply rapidly decreasing, she desperately tries to recover her memories, uncovering unsettling clues about her confinement. As she fights to survive, she must confront the disturbing reality of her situation and find a way to escape the claustrophobic environment before it’s too late.

Warning: spoilers below!

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Oxygen (2021) – Full Plot Summary & Ending Explained

Read the complete plot breakdown of Oxygen (2021), including all key story events, major twists, and the ending explained in detail. Discover what really happened—and what it all means.

A woman named Elizabeth Hansen awakens in a sealed medical cryogenic unit, only to realize she is trapped inside as the oxygen depletes rapidly. Suffering from memory loss, she struggles to recall her identity and the circumstances that led her there. She finds some support in an advanced AI called M.I.L.O. (Medical Interface Liaison Officer), which unfortunately will not unlock the unit unless provided with an administrator code.

In a desperate attempt to escape, she uses M.I.L.O. to send a distress signal to emergency services, relaying the model and serial number of the cryo unit inscribed on its interior. However, upon contacting the manufacturer, she learns that the unit had been destroyed three years earlier. This unsettling news only adds to her confusion as she desperately searches for answers about her past, sifting through digital pictures and articles until she uncovers her name—Elizabeth Hansen—and her occupation as a cryogenic doctor.

Determined to connect with her loved ones, she accesses her social media and discovers her husband, Léo Ferguson. Eagerly, she calls his number, only to be met with a bewildering response from a woman who seems unaware of her claim. As the oxygen levels continue to plummet, Elizabeth begins hallucinating and attempts to escape the pod, but is met with a shocking electric shock.

Unexpectedly, she receives a call back from the police, but her suspicions about their honesty lead her to disconnect. The earlier unknown woman calls back with devastating news: her husband is dead. Additionally, she provides Elizabeth with the coveted administrator code to unlock the pod, warning her that doing so would lead to her demise. Ignoring the warning, Elizabeth enters the code and finds herself floating in zero gravity.

In a startling revelation, she learns that she has been in hyper-sleep during a 14-light-year mission to a new planet, as humanity faces extinction from a deadly virus—one that tragically claimed her husband, Léo. Overwhelmed by grief, Elizabeth realizes her awakening was the result of a processor overheating. In a race against time and dwindling oxygen, she attempts to redirect the processor’s functions, facing numerous challenges and initial failure due to capacity overload.

As desperation sets in, she contemplates suicide by reopening the pod, but she uncovers that Léo is also in hypersleep aboard the damaged ship, along with nearly 10,000 others. Strikingly, she notices that he is missing a scar he once bore, prompting her to investigate further. Through a video message from an aged version of herself, it is revealed that she is a genetic clone of the original Elizabeth Hansen, bearing implanted memories and personality traits—including those of Léo.

M.I.L.O. initiates a euthanasia protocol given her slim chances of survival, yet Elizabeth’s clone cleverly manages to override this directive and successfully redirects the processor’s functions back, ultimately re-entering hypersleep. The film concludes with a poignant scene of the clones of Léo and Elizabeth on their new home planet, smiling and embracing one another, symbolizing hope beyond despair.

Last Updated: November 15, 2024 at 18:09

Ending Explained – What Happens at the End of Oxygen?

Still wondering what the ending of Oxygen (2021) really means? Here’s a spoiler-heavy breakdown of the final scene, major twists, and the deeper themes that shape the film’s conclusion.

In the final moments of Oxygen, Elizabeth discovers that she is not a real person but a clone created for a space mission to colonize a distant planet. Her memory was transferred from the original Elizabeth, who donated her DNA for this purpose, making her essentially a lab experiment. Throughout the film, she struggles to remember her past, believing she might be connected to her husband, Leo Ferguson, but it turns out that both she and Leo are clones—part of a large group of sleeper pods onboard the spacecraft, designed to be activated once they reach the new world.

As her oxygen runs dangerously low, Elizabeth learns she is one of many clones, and her ‘self’ was manufactured in a lab for this long-term colonization plan. Her realization hits hard: her identity, her memories, and her life are all artificial, the result of scientific experiments rooted in genetic engineering. The woman in the pod, including the man she believed was her husband, are all clones—merely copies built with the collective memories of the original people.

Despite her despair, Elizabeth manages to summon enough hope and determination. She asks Milo, the AI, to transfer the oxygen from the other pods containing deceased clones, in an effort to save herself. Although the process is slow and complicated, she makes this desperate plea knowing that her life might be ending soon. In her final moments, she envisions herself on a new planet, walking with Leo in a peaceful, beautiful landscape. The film ends with the image of Elizabeth and Leo spending their lives together on the alien world, symbolizing a new beginning for the copies of the original humans.

In essence, Oxygen explores themes of identity, memory, and the ethical boundaries of scientific experimentation. The ending reveals that she wasn’t truly human but a clone, raising questions about what makes a person truly alive, especially when memories and physicality can be artificial constructs. Ultimately, her hope for a new life on a distant planet closes the film on a note of renewal, even amidst the harsh reality of her manufactured existence.

Last Updated: June 25, 2025 at 08:58

Unlock the Full Story of Oxygen

Don't stop at just watching — explore Oxygen in full detail. From the complete plot summary and scene-by-scene timeline to character breakdowns, thematic analysis, and a deep dive into the ending — every page helps you truly understand what Oxygen is all about. Plus, discover what's next after the movie.

Oxygen Timeline

Track the full timeline of Oxygen with every major event arranged chronologically. Perfect for decoding non-linear storytelling, flashbacks, or parallel narratives with a clear scene-by-scene breakdown.

Oxygen Timeline

Characters, Settings & Themes in Oxygen

Discover the characters, locations, and core themes that shape Oxygen. Get insights into symbolic elements, setting significance, and deeper narrative meaning — ideal for thematic analysis and movie breakdowns.

Characters, Settings & Themes in Oxygen

Oxygen Ending Explained

What really happened at the end of Oxygen? This detailed ending explained page breaks down final scenes, hidden clues, and alternate interpretations with expert analysis and viewer theories.

Oxygen Ending Explained

More About Oxygen

Visit What's After the Movie to explore more about Oxygen: box office results, cast and crew info, production details, post-credit scenes, and external links — all in one place for movie fans and researchers.

More About Oxygen

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