Plot Summary
Radioactive (2019) Plot Summary Explained
- Release, runtime and language
- 2019 · 111 mins · English
- Echo score 63
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- Directed by
- Marjane Satrapi
- Starring
- Corey Johnson, Aneurin Barnard, Sam Riley, Jennifer White, Simon Russell Beale, Rosamund Pike
- Budget
- $20M
A look at the life of Marie Curie, the pioneering physicist and chemist who conducted groundbreaking research on radioactivity. The film explores her remarkable scientific achievements and the profound impact of her discoveries alongside her husband, Pierre. Their work with radium revolutionized the 20th century, forever changing science and medicine, while also revealing the personal sacrifices and challenges they faced.
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Full plot summary · contains spoilers
What Happens in Radioactive: Full Plot Summary
The whole story of Radioactive (2019) 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.
In 1934, Marie Curie collapses in her laboratory in Paris. As she is rushed to the hospital, she remembers her life. In 1893 she was frequently rejected for funding due to her attitude, which she had in common with Pierre Curie. This joint attitude issue with the leading academic authorities led her to share a laboratory with Pierre Curie.
Before Marie discovers polonium and radium, the two fall in love, marry, and have two children. Soon, Marie announces the discovery of radioactivity, revolutionizing physics and chemistry. Radium is soon used in a series of commercial products. Pierre takes Marie to a séance where it is used to attempt to contact the dead, but Marie disapproves of spiritualism and the idea of an afterlife after the death of her mother in Poland.
Although Pierre rejects the Légion d'honneur for not nominating Marie and insists that they jointly share their Nobel Prize in Physics, she becomes agitated that he accepted the Prize in Stockholm without her. Soon afterwards Pierre becomes increasingly sick with anemia as a result of his research and is trampled to death by a horse and cart.
Marie initially dismisses concerns that her elements are toxic, but increasing numbers of people die from serious health conditions after exposure to radium. Depressed, she begins an affair with her colleague Paul Langevin. Although she receives Pierre's professorship at the Sorbonne, the French nationalist press reports the details of her affair with Langevin and she is harassed by xenophobic mobs due to her Polish origins.
Marie returns to the house where she attended the seance and tearfully begs her friend, Loie Fuller, who was there to try to use radium to contact Pierre. When she is awarded the Nobel Prize in Chemistry in 1911, she defies the committee's instructions not to travel to Stockholm and at her award ceremony receives a standing ovation from the entire audience.
In 1914, when World War I starts, Marie's daughter Irene convinces her to run an X-ray unit on the Western Front in order to determine whether or not amputation is needed for wounded soldiers. Irene begins dating Frédéric Joliot, and Marie initially disapproves of that relationship because of their joint research into induced radioactivity, later asking Irene not to take part in Frédéric's future work on this because of possible effects on her health. Although Irene does not heed her mother, together they go to the Western Front to run the X-ray machine.
Scenes of Marie's life are interwoven with scenes depicting the future impact of her discoveries, including external beam radiotherapy at a hospital in Cleveland in 1956, the atomic bombings of Hiroshima and Nagasaki, a nuclear bomb test in Nevada in 1961, and the Chernobyl disaster in 1986. As she dies in 1934, she sees visions of these events before awakening in a hospital room. Pierre arrives and they leave the hospital together.
Before the film's credits, the Curies' accomplishments are detailed, including their mobile unit which X-rayed more than a million men during the war "saving countless lives", their research would be used to create radiotherapy, and the Joliot-Curies would discover artificial or induced radioactivity in 1935.
The movie's last image is of a photo showing Marie Curie's attendance at the 1927 Solvay Conference with many other celebrated physicists, including Albert Einstein.
Last updated: October 09, 2026 at 15:48
Plot questions answered
Radioactive Plot Explained: Your Questions Answered
The questions people ask most about Radioactive (2019): 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 does Marie Curie see visions of future events before dying in Radioactive?
As Marie collapses in her laboratory in 1934 and is rushed to the hospital, the film intercuts her fading life with flash-forwards to external beam radiotherapy in 1956, the atomic bombings of Hiroshima and Nagasaki, a nuclear bomb test in Nevada in 1961, and the Chernobyl disaster in 1986. These visions represent the long-term, unintended consequences of her discovery of radioactivity, showing both its medical benefits and its capacity for destruction. The film frames her death as a moment of reckoning in which she witnesses the full legacy of her work.
Foreshadowing: Early in the film, radium's commercial popularity is shown almost immediately after its discovery, subtly setting up the idea that its impact will spread far beyond the laboratory.
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Q2 How did Pierre Curie die in the movie?
Pierre Curie becomes increasingly sick with anemia as a result of prolonged exposure to radioactive materials during his research. His weakened physical state leaves him unable to avoid a horse and cart, which tramples him to death. His death illustrates how the same radium that earned the Curies worldwide fame was simultaneously destroying their bodies from within.
Foreshadowing: Earlier scenes show Pierre handling radioactive materials without any protective equipment, establishing how vulnerable he and Marie both are to the substances they study.
- pierre curie death
- horse and cart accident
- anemia from radiation
Q3 Why did Marie initially dismiss concerns that radium was toxic?
After announcing the discovery of radioactivity, Marie Curie was so consumed by the scientific triumph and the wave of commercial products being developed with radium that she minimized early warnings about its dangers. It is only after growing numbers of people begin dying from serious health conditions following exposure that the true cost of the discovery becomes undeniable. Her initial denial reflects how even the most brilliant scientists can be blind to the consequences of their own breakthroughs.
Foreshadowing: The séance scene hints at this blindness, showing radium being used frivolously to attempt to contact the dead without any awareness of its biological danger.
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Q4 Why does Marie disapprove of the séance in the film?
When Pierre takes Marie to a séance where radium is used in an attempt to contact the dead, she strongly disapproves of spiritualism and the idea of an afterlife. Her rejection stems partly from her scientific worldview and partly from the unresolved grief she still carries over her mother's death in Poland. The séance offends both her rationalism and her sense that the dead cannot be reached.
Foreshadowing: The film notes that the séance introduces the idea of contacting Pierre after his eventual death, setting up Marie's later tearful return to the same house.
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Q5 Why did Marie Curie begin an affair with Paul Langevin?
After Pierre's sudden death, Marie falls into a deep depression that leaves her emotionally vulnerable. Her affair with Paul Langevin, a fellow scientist and colleague, grows out of that grief rather than any calculated decision. The relationship exposes her to public humiliation when the French nationalist press publishes the details, framing her as a foreign woman corrupting a Frenchman.
Foreshadowing: After Pierre's death, Marie is shown isolated in her laboratory with no scientific or emotional partner, planting the conditions for the affair.
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- depression after pierre
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Q6 Why does Marie beg Loie Fuller to use radium to contact Pierre?
Grief-stricken and alone, Marie returns to the house where the earlier séance had taken place and tearfully asks her friend Loie Fuller to try again to contact Pierre using radium. This moment marks a complete reversal of her earlier rejection of spiritualism, showing that her scientific rationality cannot withstand the weight of losing Pierre. Her willingness to embrace the very ideas she once mocked underscores how broken she has become.
Foreshadowing: Her firm rejection of the séance earlier in the film makes her later plea to Loie Fuller all the more devastating as a turning point in her grief.
- marie curie grief
- contacting pierre
- loie fuller seance
Q7 Why did Marie Curie defy the Nobel committee and travel to Stockholm in 1911?
When Marie is awarded the Nobel Prize in Chemistry in 1911, the committee instructs her not to travel to Stockholm because of the scandal surrounding her affair with Langevin. She ignores the instruction and attends the ceremony in person, where the entire audience rises in a standing ovation. Her defiance is an assertion that her scientific identity cannot be erased by personal scandal, and the audience's reaction confirms that the world still recognizes her as one of the greatest scientists of her era.
Foreshadowing: Her earlier agitation when Pierre accepted the Nobel Prize in Physics without her shows how much being present for recognition matters to her.
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Q8 Why does Marie disapprove of Irene's relationship with Frédéric Joliot?
Marie initially disapproves of her daughter Irene dating Frédéric Joliot because the couple are conducting joint research into induced radioactivity, a field Marie knows intimately to be hazardous. She asks Irene not to take part in Frédéric's future work on the subject because of possible effects on her health. Ironically, the Joliot-Curies would go on to discover artificial radioactivity in 1935 and win their own Nobel Prize, validating the research Marie tried to protect Irene from.
Foreshadowing: Marie's own struggle with aplastic anemia and Pierre's death from radiation-induced illness are direct warnings she passes on to Irene.
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- induced radioactivity research
- marie disapproves daughter
Q9 Why did Marie Curie run X-ray units on the Western Front during World War I?
When World War I begins in 1914, Marie's daughter Irene convinces her to set up mobile X-ray units on the Western Front to help field surgeons determine whether wounded soldiers required amputation. The choice is a deliberate application of Marie's discoveries to a humanitarian crisis, transforming her abstract scientific work into a direct tool for saving lives. According to the film, the units X-rayed more than a million men during the war.
Foreshadowing: Marie's earlier interaction with radioactivity's destructive potential makes her choice to redirect it toward healing a deeply meaningful turning point.
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Q10 What is the meaning of the film's ending?
After Marie's visions of Hiroshima, Nagasaki, the Nevada test, and Chernobyl, she awakens in a hospital room and sees Pierre, who has come to take her away with him. The sequence reframes her death not as a pure loss but as a dreamlike reunion with her scientific partner and husband. The film then closes on the real-life photograph of Marie Curie attending the 1927 Solvay Conference alongside Albert Einstein and other celebrated physicists, cementing her place among the defining minds of the twentieth century.
Foreshadowing: Marie's earlier rejection of the afterlife and her later desperate plea to contact Pierre through radium converge in this final reunion.
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- marie reunion pierre
- solvay conference 1927
Q11 Why was Marie Curie harassed by mobs during the Langevin affair scandal?
When the French nationalist press published the details of Marie's affair with Paul Langevin, she became the target of xenophobic mobs who resented her as a Polish-born woman occupying a prestigious French academic position. Even though she had received Pierre's professorship at the Sorbonne through legitimate scientific merit, the scandal fused personal and national prejudice against her. The harassment reflects both the gender politics of the era and the hostility directed at foreign-born intellectuals in early twentieth-century France.
Foreshadowing: Her earlier rejection for funding due to her attitude had already marked her as an outsider to the French academic establishment.
- marie curie xenophobia
- polish born scientist
- langevin scandal france
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