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The Bigamist (1956) movie poster

Plot Summary

The Bigamist (1956) Plot Summary Explained

Release, runtime and language
1956 · 95 mins · Italian
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Directed by
Luciano Emmer
Starring
Vittorio De Sica, Marcello Mastroianni, Marisa Merlini, Memmo Carotenuto, Salvo Randone, Giovanna Ralli

A traveling salesman is sent to prison after being accused of bigamy, while his wife and son are forced to consider leaving him permanently.

On this page (6)
  1. 1 Where to watch
  2. 2 What happens: full plot
  3. 3 Plot questions answered
  4. 4 Movie threads
  5. 5 Movies like The Bigamist
  6. 6 Every angle
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Full plot summary · contains spoilers

What Happens in The Bigamist: Full Plot Summary

The whole story of The Bigamist (1956) 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.

Mario De Santis, an enterprising toothpaste salesman, is married to Valeria Masetti, and he expects a straightforward life. That expectation is upended when he is accused of bigamy, a charge that drags him into a tense legal ordeal and puts his reputation on the line.

At the police station, he is confronted with Isolina Fornaciari, a woman who asserts that they would have been married in Forlimpopoli years earlier, a claim that shakes his sense of certainty and loyalty. The accusation cascades through his world, casting doubt on his innocence in the eyes of many, including his wife, who is influenced by her sister and the family lawyer.

After guards finally grant him bail, the case is entrusted to a distinctly eccentric and talkative figure, the Honorable Prince of the forum, whose flamboyant persona becomes a curious catalyst in the courtroom drama. The strange new ally raises questions and adds an air of farce to the mounting tension as the truth begins to bend under pressure.

A friend of Mario's, Quirino Proietti, whom he meets in prison, realizes that this may hinge on a case of mistaken identity and sets off to track down Isolina's real husband, roaming across Rome in a determined search. The quest takes on a comic-but-serious pace as the city becomes a backdrop for the pursuit of clarity amid chaos.

When the pursuer finds the man in question, he brings him to court, where Mario—acting on the advice of his defender—pleads guilty in a strategic pivot intended to navigate the legal maze. The proceedings reveal a twist: the court, while clearing Mario of bigamy, convicts him of self-malignancy, and Isolina, described as an elderly single woman who had exploited the circumstance to try to trap a handsome man, is condemned for perjury. The verdict unsettles everyone and reframes the stakes of the case.

Having served a small sentence, Mario is finally able to return to his family, who are waiting for him at the prison exit. The film closes on a note of cautious reconciliation, with the once-fractured household coming back together and the notion of truth, loyalty, and the quirks of the law lingering in the air.

Last updated: February 24, 2026 at 13:37

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Plot questions answered

The Bigamist Plot Explained: Your Questions Answered

The questions people ask most about The Bigamist (1956): 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 Isolina Fornaciari accuse Mario of bigamy?

Isolina Fornaciari claims she married Mario De Santis years earlier in Forlimpopoli. However, it was actually a case of mistaken identity, she married a different man with the same name. Isolina, described as an elderly single woman, was trying to trap a handsome man into marriage and used the false claim to pursue Mario.

Foreshadowing: The accusation surfaces at the police station, where Isolina directly confronts Mario about a marriage he has no memory of.

  • Isolina Fornaciari
  • bigamy accusation
  • Forlimpopoli
  • mistaken identity
Q2

Why does Mario plead guilty to bigamy charges?

Mario pleads guilty on his defender's advice as a strategic move to navigate the legal maze. By pleading guilty, he could expose the complications of the case and reveal the truth about the mistaken identity. This counterintuitive strategy was meant to clarify his position and ultimately lead to his exoneration.

Foreshadowing: The eccentric lawyer's theatrical defense approach foreshadows this unconventional courtroom strategy.

  • Mario pleads guilty
  • courtroom strategy
  • legal defense
Q3

Why is Mario convicted of self-malignancy if he was innocent of bigamy?

The court recognizes Mario is innocent of bigamy because the marriage never actually occurred, there was a case of mistaken identity. However, by admitting to the charges through his guilty plea and making statements about himself during the trial, he is convicted of self-malignancy, which essentially means he defamed his own character through his admissions.

Foreshadowing: Mario's decision to plead guilty directly leads to this unexpected verdict.

  • self-malignancy conviction
  • court verdict
  • bigamy cleared
Q4

What happens to Isolina after the truth is revealed?

Isolina is condemned for perjury when her false accusation is exposed. The court determines she had exploited the circumstance of the same-name situation to try to trap a handsome man into marriage. Her scheme backfires completely, and she faces legal consequences for her deception.

Foreshadowing: The friend finding Isolina's real husband in Rome directly exposes her lies.

  • Isolina perjury
  • false accusation
  • court consequences
Q5

Why does Mario's wife Valeria doubt his innocence?

Valeria Masetti begins to doubt Mario's innocence after being influenced by her sister and the family lawyer. The social pressure and gossip from neighbors and relatives cause trust to fracture between the couple. The surrounding environment closes ranks against Mario, and Valeria stands apart from him during the legal ordeal.

Foreshadowing: The family's lawyer adds pressure on Valeria to distance herself from Mario.

  • Valeria Masetti
  • marital doubt
  • family pressure
Q6

How does Mario's friend discover the case of mistaken identity?

Quirino Proietti, a friend Mario meets in prison, realizes the case may hinge on a same-name situation. He travels across Rome searching for Isolina's real husband and eventually finds the man. He then brings this person to court, where the crucial truth about the mistaken identity surfaces.

Foreshadowing: Early in the investigation, the possibility of confusion about Mario's identity is hinted at.

  • Quirino Proietti
  • Rome search
  • mistaken identity discovery
Q7

What role does the eccentric prince of the forum play in the case?

After Mario is granted bail, his case is entrusted to the Honorable Prince of the forum, an eccentric and flamboyant defender. This talkative and theatrical lawyer becomes a curious catalyst in the courtroom drama, adding an air of farce to the mounting tension as the truth begins to emerge.

Foreshadowing: The prince's flamboyant persona is introduced when Mario gets bailed out.

  • prince of the forum
  • eccentric lawyer
  • courtroom defense
Q8

What happens to Mario at the end of the film?

Mario serves a small sentence for self-malignancy and is released from prison. His wife Valeria and son are waiting for him at the prison exit. The family reunites, and the film closes on a note of cautious reconciliation, with the household coming back together after the legal ordeal.

Foreshadowing: The verdict sets the stage for Mario's minimal sentence and eventual return to his family.

  • Mario released
  • prison reunion
  • family reconciliation

Movie threads

More Movies Like The Bigamist, by Mood & Story

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

Lighthearted Legal Farces like The Bigamist

Absurd courtroom comedies and mix-ups where the law meets lunacy. If you enjoyed the quirky courtroom confusion in The Bigamist, you'll love these other movies featuring absurd legal misunderstandings, eccentric lawyers, and comedic justice. Discover similar stories where a lighthearted tone turns legal drama into sheer farce.

  • satirical
  • farce
  • lighthearted
  • courtroom
  • misunderstanding
  • absurd
  • Tone: light, humorous, satirical
  • Pacing: steady, logical progression
Why these movies?

The story pattern: These stories typically follow an ordinary protagonist caught in an extraordinary legal web due to a case of mistaken identity or a simple misunderstanding blown out of proportion. The plot moves steadily through investigation and courtroom antics, driven by a colorful supporting cast, and concludes with the protagonist's exoneration.

Why they belong together: Movies are grouped here based on their shared focus on legal satire, a light and humorous tone, and narratives built around farcical misunderstandings rather than serious crime or punishment. They offer a mix of steady pacing, medium intensity from the central conflict, and a fundamentally happy, reassuring outcome.

Comedies of Mistaken Identity like The Bigamist

Hilarious chaos ensues when a simple case of mistaken identity spirals out of control. Fans of the identity mix-up chaos in The Bigamist will enjoy these movies where a simple misunderstanding leads to a cascade of comic errors. Find similar films centered on false accusations, confused identities, and lighthearted journeys to the truth.

  • mistaken identity
  • farce
  • absurd
  • humorous
  • quirky
  • chaotic
  • Tone: lighthearted, absurd, quirky
  • Pacing: steady, farcical escalation
Why these movies?

The story pattern: The narrative pattern involves an innocent character wrongly accused or identified, leading to a series of increasingly absurd situations. The journey involves clearing their name, often with the help of an eccentric ally, while navigating a world that has temporarily gone mad. The resolution is ultimately happy, reaffirming the protagonist's true identity.

Why they belong together: These films share a core plot device of mistaken identity that drives the humor. They maintain a light emotional weight and a steady pace, focusing on the farcical unraveling of a misunderstanding rather than deep drama. The tone is consistently humorous and the endings are satisfyingly happy.

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Every angle

The Bigamist (1956) Explained: Plot, Timeline & Characters

Everything about The Bigamist 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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