Story Structure — 5 Plot Phases
Fog, Ink, and an Unseen Passenger
Two friends struggle to find a house in the dark and fog after discovering that their written address is useless. A radio report and a hidden passenger introduce the first danger.
Key Events
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Lost Address in the Fog — The two friends discover that the address was written with an empty pen.
Location: Dark foggy road
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Searching for a House — The friends continue driving through the darkness while trying to locate the house.
Location: Foggy road
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Radio Escape Report — A radio broadcast reports that an escaped convict is hiding somewhere nearby.
Location: Car
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Hidden Passenger Revealed — The reported convict is revealed to have been hiding in the back seat.
Location: Back seat of the car
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House with a Light — The travelers find a house with a light on and stop there for help.
Location: House exterior
The Silent House
The travelers reach a lit house, receive no answer, and enter its apparently empty interior. The covered furniture and hidden observer make the setting increasingly suspicious.
Key Events
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House with a Light — The travelers find a house with a light on and stop there for help.
Location: House exterior
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Unanswered Doorbell — They ring the doorbell, but nobody answers.
Location: House entrance
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Entering the Empty House — The women enter and find the house apparently unoccupied, with cloth covering the furniture.
Location: House interior
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The Peephole Watcher — The Mad Scientist watches the visitors through a peephole. Characters: Mad Scientist
Location: Hidden observation point
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House as a Trap — The Mad Scientist reveals that he designed the house as a trap. Characters: Mad Scientist
Location: Hidden room
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Revenge Against Women — He explains that his trap is intended as revenge for his failed love life. Characters: Mad Scientist
Location: Hidden room
A Mechanical Courtship
The Mad Scientist reveals that the house is a revenge trap built around his resentment toward women. He activates a robot to seduce one visitor while tormenting the other.
Key Events
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Revenge Against Women — He explains that his trap is intended as revenge for his failed love life. Characters: Mad Scientist
Location: Hidden room
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Robot Activation — The Mad Scientist activates a robot to carry out his scheme. Characters: Mad Scientist
Location: House interior
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Robot Courts Patsy — The robot attempts to seduce one visitor under the scientist's direction. Characters: Mad Scientist
Location: House interior
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Thema Becomes the Target — The Mad Scientist uses the robot and other pranks against the other visitor. Characters: Mad Scientist
Location: House interior
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Pranks Escalate — The scientist's tricks continue until the targeted visitor loses patience. Characters: Mad Scientist
Location: House interior
The Trap Turns Against Its Maker
The pranks escalate until the targeted visitor attacks the robot. The other visitor discovers the hidden scientist and directly confronts him.
Key Events
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Attack on the Robot — Thema attacks the robot after becoming fed up with the scientist's pranks. Characters: Mad Scientist
Location: House interior
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Hidden Scientist Discovered — Patsy discovers the hidden Mad Scientist behind the house's tricks. Characters: Mad Scientist
Location: Hidden room
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Patsy Rebukes Him — Patsy berates the Mad Scientist after uncovering his scheme. Characters: Mad Scientist
Location: Hidden room
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Scientist Loses Control — The Mad Scientist loses control of the robot during the confrontation. Characters: Mad Scientist
Location: House interior
Chaos and Escape
The scientist loses control of the robot, while the robot, scientist, and convict become involved in the final conflict. Once the disorder ends, the two friends escape the house.
Key Events
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Robot and Convict Clash — The robot, scientist, and hidden convict become involved in the resulting conflict. Characters: Mad Scientist
Location: House interior
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Conflict Resolves — The conflict involving the robot, scientist, and convict finally comes to an end. Characters: Mad Scientist
Location: House interior
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Escape from the House — The two friends escape the house after the confrontation is resolved. Characters: Mad Scientist
Location: House exterior
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Trap Finally Abandoned — The scientist's revenge trap fails as the visitors leave the house. Characters: Mad Scientist
Location: Mad Scientist's house
Thelma and Patsy find themselves in a spooky house inhabited by a nut who is a mechanical genius and has made a robot who does everything. The inventor manipulates the robot's control board from a hidden room. The girls are soon in a panic. Patsy gets into an argument with the robot and loses the match of wits. Blackie Burke, an escaped convict, is using the house as a hideout, and this adds to the problems the girls already have.