Story Structure — 5 Plot Phases
The Blind Witness
An engineer loses his sight, arrives at the wrong house, and discovers a body and a ring. The killers knock him unconscious, but the police cannot verify his story.
Key Events
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Accident Causes Blindness — An engineer loses his eyesight in an accident and is scheduled for an operation.
Location: Unspecified location
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Wrong Address Arrival — A driver mistakenly leaves the blind engineer at the wrong house.
Location: A house at the wrong address
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Body And Ring Found — The engineer enters the house and discovers a body and a ring on the floor.
Location: The house at the wrong address
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Killers Discover Blindness — Three killers decide to knock the engineer unconscious because he cannot identify them.
Location: The house at the wrong address
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Police Find No Evidence — The police investigate but cannot locate the house or the body.
Location: Unspecified police investigation site
Sight And Suspicion
After recovering his eyesight, the engineer returns to the house and connects the ring to a presumed-dead man. Information from Chalky and a voice recognition at a travel agency point toward a smuggling ring.
Key Events
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Sight Is Restored — The engineer undergoes the operation and regains his eyesight.
Location: Medical facility
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Return To The House — After recovering his sight, the engineer returns to investigate the unexplained crime.
Location: The house after the operation
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Ring Identified By Photograph — A photograph leads the engineer to connect the ring with a presumed-dead man.
Location: The house after the operation
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Chalky Offers Leads — The engineer and a presumed-dead man's friend discuss the night of the disappearance and receive leads. Characters: Chalky
Location: An unspecified meeting place
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Voice Recognition — The engineer recognizes Guy Sinclair's voice as belonging to one of the men who knocked him out. Characters: Guy Sinclair
Location: A travel agency
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Smuggling Ring Exposed — The investigation establishes that Sinclair and two other men are involved in a smuggling ring. Characters: Guy Sinclair
Location: Unspecified investigation locations
The Coded Trail
A coded book implicates the smugglers and leads the engineer to The Grange. He is captured there but escapes with help from a woman connected to the presumed-dead man.
Key Events
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Coded Book Obtained — The engineer obtains a coded book that incriminates the three smugglers.
Location: Unspecified location
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The Grange Discovered — The engineer tracks the criminals to an isolated house known as The Grange.
Location: The Grange
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Engineer Held Prisoner — One of the gang members captures the engineer and holds him prisoner at The Grange.
Location: The Grange
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Escape From The Grange — The engineer escapes from captivity with help from a woman connected to the presumed-dead man.
Location: The Grange
Betrayal And Hostage
The woman is killed before she can provide information, while another woman disappears after receiving a message. The engineer discovers that Chalky has been secretly working with the gang.
Key Events
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Chalky Joins Investigation — The engineer enlists Chalky's help and they go to seek information from the woman who helped him escape. Characters: Chalky
Location: An unspecified meeting place
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Witness Is Killed — The gang kills the woman before the engineer and Chalky can question her.
Location: The witness's location
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Hostage Message — A woman disappears after receiving a message asking her to meet someone at midday.
Location: Unspecified locations
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Chalky's Betrayal Revealed — The engineer realizes that Chalky has been working with the gang throughout the investigation. Characters: Chalky
Location: Unspecified location
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Mistaken Gang Killing — The gang mistakenly kills Chalky instead of the engineer. Characters: Chalky
Location: Unspecified location
The Grange Confrontation
The engineer finds the hostage at The Grange and learns that the presumed-dead man is alive and leads the criminal operation. The gang is defeated, its leader dies while escaping, and the investigation closes.
Key Events
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Hostage Found At Grange — The engineer finds the missing woman being held hostage at The Grange after asking her father to contact the police.
Location: The Grange
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Presumed Death Exposed — The supposed dead man is revealed to be alive and to have led the gang after faking his death.
Location: The Grange
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Original Murder Explained — The body discovered at the beginning is revealed to have belonged to a customs investigator.
Location: The Grange
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Gang Leader Falls — The engineer and police foil the gang, and its leader falls to his death while trying to escape.
Location: The Grange
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Investigation Reaches Closure — The engineer and the rescued woman leave together after the criminal conspiracy is stopped.
Location: Outside The Grange