Story Structure — 4 Plot Phases
A Warning Delivered
A man visits Dr. Crabtree and an inspector after receiving notes threatening his life. The latest message sets a precise deadline for the threatened killing.
Key Events
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The Threatened Man Seeks Help — A man visits Dr. Crabtree and an inspector because he has received notes threatening his life. Characters: Dr. Crabtree
Location: Unspecified meeting place
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The Death Threat Notes — The notes establish that someone has threatened to kill the visitor. Characters: Dr. Crabtree
Location: Unspecified meeting place
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The Eight O'Clock Deadline — The latest note says the threatened man will die at eight o'clock that night. Characters: Dr. Crabtree
Location: Unspecified meeting place
The Planned Protection
The eight o'clock threat prompts an immediate protective response. Two men are sent to the threatened man's house.
Key Events
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The Eight O'Clock Deadline — The latest note says the threatened man will die at eight o'clock that night. Characters: Dr. Crabtree
Location: Unspecified meeting place
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Protection Is Ordered — The inspector responds to the deadline by sending two men to the threatened man's house. Characters: Dr. Crabtree
Location: Unspecified meeting place
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The Guarded House — Two men are sent to the house to protect the threatened visitor.
Location: The threatened man's house
Murder in Plain Sight
Despite the protective presence, the threatened man is murdered at the house. The apparent security makes the crime especially baffling.
Key Events
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The Guarded House — Two men are sent to the house to protect the threatened visitor.
Location: The threatened man's house
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Murder Under Observation — The threatened man is murdered despite the presence of the two protectors.
Location: The threatened man's house
The Unsolved Mechanism
The murder becomes an impossible-case mystery because it happened under everyone's noses. Dr. Crabtree and the inspector begin determining what really happened.
Key Events
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The Impossible Crime — The murder occurred under everyone's noses, creating the central mystery for the investigators. Characters: Dr. Crabtree
Location: The threatened man's house
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The Investigation Begins — Dr. Crabtree and the inspector must determine what really happened. Characters: Dr. Crabtree
Location: Unspecified location