Story Structure — 5 Plot Phases
The First Feeding
Ron Bell is eaten in his home, and Mike discovers the unexplained remains. Slime trails suggest that the danger came from the basement and sewer system.
Key Events
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Ron Bell Is Eaten — A swarm of carnivorous slugs eats Ron Bell alive in his living room. Characters: Ron Bell
Location: Ron Bell's living room
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Body Discovery — Mike discovers Ron's near-skinless body while preparing to deliver an eviction notice. Characters: Mike Brady, Ron Bell
Location: Ron Bell's house
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Basement Slime Trails — Mike finds multiple slime trails leading from the basement but cannot identify the killer. Characters: Mike Brady
Location: Ron Bell's basement
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Sewer Blockage Investigation — Mike and Don respond to a blockage and inspect the obstructed sewer pipes. Characters: Mike Brady, Don Palmer
Location: Ashton sewer system
Signs Beneath Ashton
Mike and Don find animal carcasses in blocked sewer pipes. Abnormally large slugs appear, while Foley begins documenting their violent behavior.
Key Events
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Carcasses In The Pipes — Don discovers several animal carcasses stuck inside the sewer pipes. Characters: Don Palmer
Location: Ashton sewer system
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Gardening Shed Explosion — A hidden slug attacks a gardener's hand, triggering a fire and gasoline explosion.
Location: Harold Morris's property
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Garden Slugs Found — Mike discovers abnormally large aggressive slugs and collects specimens in a jar. Characters: Mike Brady
Location: Mike Brady's garden
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Specimens Reach School — Mike leaves captured slugs with Foley for scientific investigation. Characters: Mike Brady, John Foley
Location: School science laboratory
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Hamster Attack Witnessed — Foley witnesses a slug attack and eat the class hamster. Characters: John Foley
Location: School science laboratory
The Townwide Outbreak
Teenagers are killed and a contaminated salad causes a grotesque medical crisis. Mike connects the deaths to the slugs, but his warning is dismissed.
Key Events
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Hamster Attack Witnessed — Foley witnesses a slug attack and eat the class hamster. Characters: John Foley
Location: School science laboratory
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Teenagers Are Attacked — Two teenagers are attacked and eaten by the aggressive slugs.
Location: Ashton
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Slug Enters Food — A diner unknowingly eats part of a slug hidden in a salad.
Location: A local restaurant
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Murders Investigated — Mike investigates the teenagers' deaths and proposes that slugs caused the murders. Characters: Mike Brady
Location: Ashton
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Sewer Pattern Identified — Don connects the murder locations to the layout of Ashton's sewer system. Characters: Mike Brady, Don Palmer
Location: Ashton sewer system
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Toxic Dump Theory — Don theorizes that leaked chemicals from an abandoned toxic waste dump caused the mutation. Characters: Mike Brady, Don Palmer
Location: Ashton sewer system
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Blood Flukes Emerge — The unwell diner collapses as blood flukes burst from his eye sockets.
Location: A local restaurant
Chemical Counterattack
Mike and Don trace the threat to the sewer breeding ground and suspect toxic waste caused the mutation. Foley prepares lithium-based arsenic for the attack.
Key Events
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Blood Flukes Emerge — The unwell diner collapses as blood flukes burst from his eye sockets.
Location: A local restaurant
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Home Sink Warning — Mike witnesses slugs crawling through the sink and realizes the threat has reached homes. Characters: Mike Brady
Location: Mike Brady's home
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Arsenic Formula Revealed — Foley shows Mike a lithium-based arsenic compound intended to kill the sewer slugs. Characters: Mike Brady, John Foley
Location: School science laboratory
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Breeding Ground Entered — Mike and Don enter the sewer and locate the slugs' breeding ground. Characters: Mike Brady, Don Palmer
Location: Slug breeding ground
Explosion And Aftermath
Don is devoured underground, forcing Mike to act immediately. The arsenic destroys the infestation but damages Ashton, and one slug survives.
Key Events
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Breeding Ground Entered — Mike and Don enter the sewer and locate the slugs' breeding ground. Characters: Mike Brady, Don Palmer
Location: Slug breeding ground
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Don Is Devoured — Don falls into the breeding ground and is eaten alive while Mike escapes through a manhole. Characters: Mike Brady, Don Palmer
Location: Slug breeding ground
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Chemical Sewer Blast — Foley pumps arsenic into the sewer through a firetruck hose, destroying the infestation in an explosion. Characters: Mike Brady, John Foley
Location: Ashton sewer system
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Emergency Response Arrives — The blast seriously damages the town, and emergency services arrive as Mike survives. Characters: Mike Brady, John Foley
Location: Ashton
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One Slug Survives — The infestation appears destroyed, but one slug is revealed to have survived the explosion.
Location: Ashton
People are dying mysteriously and gruesomely, and nobody has a clue what the cause is. Only health worker Mike Brady has a possible solution, but his theory of killer slugs is laughed at by the authorities. Only when the body count begins to rise and a slug expert from England begins snooping around does it begin to look like Mike had the right idea after all.