A calculated murder plot unravels through canine intuition and human deduction.
Story Structure — 4 Plot Phases
The Sealed Villa Murder
Paul Decker executes a meticulously planned murder using a snorkel and floorboards. Authorities discover the body and initially classify it as suicide due to the locked room.
Key Events
Murder in Sealed Room — Paul Decker kills his wife using a snorkel hidden under floorboards. Characters: Paul DeckerLocation: Italian Villa
Discovery of Body — Household servants discover the body, prompting police investigation. Characters: Inspector, WilsonLocation: Italian Villa
Initial Suicide Theory — Inspector and Wilson initially suspect suicide due to the sealed room. Characters: Inspector, WilsonLocation: Italian Villa
Arrival of Travelers — Jean Edwards arrives at the villa with Madge's daughter and a dog. Characters: Jean EdwardsLocation: Villa Entrance
Suspicion Arises — Jean Edwards immediately suspects Decker of foul play regarding the death. Characters: Paul Decker, Jean EdwardsLocation: Villa
Canine Clues and Beach Suspicion
Jean Edwards arrives and suspects foul play. A dog discovers the murder tool, leading Decker to poison it. At the beach, Jean deduces the exact method used.
Key Events
Suspicion Arises — Jean Edwards immediately suspects Decker of foul play regarding the death. Characters: Paul Decker, Jean EdwardsLocation: Villa
Canine Discovery — A dog discovers the snorkel under the floorboards, alerting Decker. Characters: Paul DeckerLocation: Paul Decker's Room
Poisoning the Dog — Decker poisons the dog after realizing it poses a threat to his secret. Characters: Paul DeckerLocation: Villa Grounds
Beach Picnic — The group enjoys a beach picnic where Decker observes a swimmer. Characters: Paul Decker, Jean EdwardsLocation: Beach
Realization of Method — Jean Edwards sees a man swimming with a snorkel and deduces the murder method. Characters: Jean EdwardsLocation: Beach
The Drugged Milk Trap
Decker escalates his efforts by fabricating a suicide note and drugging milk to eliminate the daughter. He hides under the floorboards once more.
Key Events
Realization of Method — Jean Edwards sees a man swimming with a snorkel and deduces the murder method. Characters: Jean EdwardsLocation: Beach
Drowning Attempt — Decker attempts to drown Jean Edwards but abandons the plan when she resists. Characters: Paul Decker, Jean EdwardsLocation: Sea
Murder Plot Formulated — Decker decides he must kill Madge's daughter to eliminate the threat. Characters: Paul DeckerLocation: Villa
Luring the Victim — Decker fabricates a suicide note to lure the daughter back to the villa. Characters: Paul DeckerLocation: Villa
Drugged Milk — Decker offers a drugged glass of milk to incapacitate his target. Characters: Paul DeckerLocation: Paul Decker's Room
Second Concealment — Decker hides under the floorboards again, covering himself with a rug. Characters: Paul DeckerLocation: Italian Villa
Cabinet of Doom and Justice
Jean and Wilson rescue the victim just in time. Authorities remain skeptical until a cabinet is moved, trapping Decker. Justice is ultimately served.
Key Events
Second Concealment — Decker hides under the floorboards again, covering himself with a rug. Characters: Paul DeckerLocation: Italian Villa
Rescue Intervention — Jean Edwards and Wilson arrive just in time to rescue the victim. Characters: Jean Edwards, WilsonLocation: Italian Villa
Skeptical Authorities — Authorities refuse to believe the murder attempt, suspecting mental instability. Characters: Inspector, WilsonLocation: Italian Villa
Room Search — The victim insists on moving a heavy cabinet to search the room thoroughly. Characters: Jean Edwards, InspectorLocation: Italian Villa
Trapped Killer — Decker becomes trapped under the floorboards when the cabinet is moved. Characters: Paul DeckerLocation: Italian Villa
Final Decision — The victim initially leaves the killer to suffocate but changes her mind. Characters: Jean EdwardsLocation: Villa Grounds
Police Summoned — The victim calls the Inspector back to the room to solve the case. Characters: Jean Edwards, InspectorLocation: Villa Entrance
Suffocation — Decker slowly suffocates in his concealed hiding spot. Characters: Paul DeckerLocation: Italian Villa
Case Solved — The police arrive to find the sealed room and the trapped murderer. Characters: Inspector, WilsonLocation: Italian Villa
Story Breakdown
The Initial Murder — Decker executes a cold-blooded killing using hidden ventilation pipes.
Floorboard Concealment — Decker hides beneath the floorboards to avoid detection.
Snorkel Mechanism — A snorkel attached to air pipes allows him to breathe while hidden.
Investigation Begins — Police and consulate officials examine the sealed room for clues.
Suicide Theory — Authorities initially conclude the death was self-inflicted.
Canine Discovery — A dog uncovers the snorkel, alerting Decker to the breach.
Dog Poisoning — Decker eliminates the dog after it discovers the murder tool.
Beach Ambush — Decker attempts to drown Jean Edwards during a seaside outing.
Deduction and Realization — Jean Edwards pieces together the murder method through observation.
Swimmer Observation — Jean watches a man using a snorkel and connects it to the crime.
Method Confirmation — She confirms how Decker survived the sealed room murder.
The Second Trap — Decker orchestrates a new scheme to eliminate Madge's daughter.
Fabricated Note — Decker invents a suicide note to lure the victim back to the villa.
Drugged Milk — He offers an incapacitating drink to ensure her compliance.
Climactic Confrontation — The rescue operation triggers a chain of events that traps the killer.
Cabinet Shift — Moving a heavy cabinet blocks Decker's escape route.
Trapped Killer — Decker becomes permanently sealed under the floorboards.
Resolution and Justice — The authorities arrive to uncover the truth and deliver justice.
Police Summoned — Jean Edwards calls the Inspector back to the sealed room.
Suffocation End — Decker slowly suffocates as the case is finally solved.
On the Italian coast, writer Paul Decker has grown unhappy in his marriage and executes what appears to be a perfect murder of his wife. While Paul is believed to be writing a book in France, his stepdaughter, Candy, suspects him of murdering her mother, as well as her father years before. With the police unwilling to investigate any further, Candy sets out to confirm her suspicions and take Paul down herself.
