Plot Analysis Summary
A relentless detective pursues an aristocratic thief whose disguises, robberies, and escapes repeatedly overturn official justice.
Story Structure — 5 Plot Phases
A False Arrest
A robbery brings the Duke into Guerchard's investigation, but the Duke's aristocratic identity is confirmed and he is released. Footprints and a threatening letter keep suspicion alive.
Key Events
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Robbery Reported — A robbery at a millionaire's house is reported to police. Characters: Detective Guerchard
Location: Paris police station
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Bound Duke Found — Officers find the bound Duke in a departing vehicle. Characters: Duke of Charmerace, Detective Guerchard
Location: Vehicle outside the residence
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Identity Confirmed — The Duke's identity is confirmed, forcing Guerchard to release him. Characters: Duke of Charmerace, Detective Guerchard
Location: Millionaire's residence
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Footprints Inspected — Guerchard studies footprints he associates with the criminal. Characters: Detective Guerchard
Location: Outside the residence
The Masked Ball
At the Duke's ball, Sonia becomes his companion while Guerchard is trapped in the study. A blackout allows jewelry to be stolen and intensifies the detective's suspicions.
Key Events
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Threatening Letter — The Prefect gives Guerchard a letter announcing attendance at the Duke's ball. Characters: Detective Guerchard, Prefect of Police
Location: Police office
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Arrest Deadline Set — The Prefect orders an arrest within one month. Characters: Detective Guerchard, Prefect of Police
Location: Police office
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Ballroom Encounter — The Duke dances with Sonia while Guerchard secretly enters the study. Characters: Duke of Charmerace, Sonia, Detective Guerchard
Location: Duke's ballroom
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Guerchard Detained — The Duke has Guerchard held at gunpoint because he lacks credentials. Characters: Duke of Charmerace, Detective Guerchard
Location: Duke's study
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Ballroom Jewelry Theft — During a blackout, several guests lose their jewelry. Characters: Duke of Charmerace, Sonia
Location: Duke's ballroom
The Estate Robbery
The Duke and Sonia travel to the country estate as a midnight threat brings police protection. The apparent non-event conceals the theft of the estate's paintings.
Key Events
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Country Invitation — Sonia tells Guerchard that she and the Duke will leave for the estate. Characters: Duke of Charmerace, Sonia, Detective Guerchard
Location: Duke's residence
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Safe Examined — The Duke examines a safe and learns that its lock delivers an electrical shock. Characters: Duke of Charmerace
Location: Country estate study
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Midnight Threat — A letter threatens a midnight robbery because of wartime profiteering. Characters: Detective Guerchard
Location: Country estate
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Estate Guarded — Police protect the estate, then give Guerchard the front key after midnight passes. Characters: Detective Guerchard
Location: Country estate
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Paintings Stolen — While the Duke stays with Sonia, his associates steal the estate's paintings. Characters: Duke of Charmerace, Sonia
Location: Country estate
The Museum Challenge
Guerchard interrogates Sonia and receives a demand tied to the release of the arrested men. A diversion at the museum results in the theft of the Mona Lisa and exposes the thief's disguise.
Key Events
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Sonia Interrogated — Guerchard questions Sonia about her identity and the overnight alibi. Characters: Sonia, Detective Guerchard
Location: Country estate
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Release Demand — A message demands that the arrested men be released or a famous painting will be stolen. Characters: Detective Guerchard
Location: Country estate
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Museum Diversion — A diversion allows the vault to be opened and the painting to disappear. Characters: Detective Guerchard
Location: Louvre vault
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Disguise Revealed — Guerchard discovers that the thief used an elderly flower seller disguise. Characters: Detective Guerchard
Location: Louvre
The River Escape
Guerchard arrests the Duke at a hideout, where the Duke confirms his concealed identity and bargains over the stolen painting and Maria's release. The Duke survives the river shooting and later appears with Sonia at a jewelry store.
Key Events
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Hideout Arrest — Guerchard arrives as the Duke prepares to escape and arrests him. Characters: Duke of Charmerace, Detective Guerchard
Location: Hideout outside Paris
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Criminal Identity Confirmed — The Duke confirms his concealed criminal identity and bargains over the painting. Characters: Duke of Charmerace, Detective Guerchard
Location: Hideout outside Paris
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Maria Released — The Duke releases Guerchard's kidnapped daughter despite Guerchard refusing the exchange. Characters: Duke of Charmerace, Detective Guerchard
Location: Hideout outside Paris
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Jewelry Location Revealed — The Duke reveals where the jewels were stored and how Guerchard's shoes were obtained. Characters: Duke of Charmerace, Detective Guerchard
Location: Road to police headquarters
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Seine Escape Attempt — The Duke jumps toward the river after Guerchard recalls an earlier escape. Characters: Duke of Charmerace, Detective Guerchard
Location: Seine riverbank
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Shots And Resignation — Guerchard fires four shots, then offers to resign; the Prefect refuses. Characters: Duke of Charmerace, Detective Guerchard, Prefect of Police
Location: Seine riverbank and police office
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Rings Purchased — The surviving Duke and Sonia shop for rings while he jokes about Guerchard. Characters: Duke of Charmerace, Sonia
Location: Jewelry store