Don Wanderley drives south through several states with a kidnapped young girl, tying her to himself when he stops to sleep.

The Chowder Society votes to contact Don Wanderley for help investigating the death of his uncle Edward.

Sears James tells the Chowder Society about Fenny Bate's corruption by the ghost of his abusive dead brother Gregory.

Ricky and Sears find four sheep with slit throats in a snow-covered field with no blood trail and no footprints.

John Jaffrey injects himself with morphine and then follows a voice calling him to climb a bridge and jump to his death.

John Jaffrey opens a bedroom door at his party to find Edward Wanderley dead on the floor, his face frozen in agony.

Don Wanderley arrives in Milburn on the day of John Jaffrey's funeral and agrees to help the Chowder Society investigate.

Don tells the Chowder Society that after he broke off his relationship with Alma Mobley, she pursued his brother David, who died by suicide in Amsterdam.

Lewis Benedikt follows an illusory door in the forest through a series of haunting visions and is killed.

Ricky tells Don and Peter the story of how the Chowder Society accidentally killed Eva Galli and then watched her sit up in the submerged car.

Don concludes that Eva Galli, Alma Mobley, Ann-Veronica Moore, and Anna Mostyn are all the same shapeshifting creature.

Sears James crashes into a snowplow at the bottom of a hill after a hallucination lures him out into a blizzard.

Don, Ricky, and Peter hunt the Bate brothers to the town movie theater and destroy Gregory and Fenny.

Peter stabs through his hallucination in the Hollow apartment and Anna Mostyn bleeds, curls up, and dies before the three men.

Don catches a wasp on a Florida beach, holds it despite its sting, and slices it to pieces, destroying the shapeshifter for good.

The Chowder Society of Milburn, New York — four old friends — begins to unravel following the mysterious death of their fifth member, Edward Wanderley, at a party in honor of actress Ann-Veronica Moore. As more deaths accumulate, including John Jaffrey's apparent suicide and Lewis Benedikt's disappearance in the woods, Edward's nephew Don Wanderley arrives and reveals that the same shapeshifting creature who destroyed his own brother has followed him to Milburn. Don pieces together that Eva Galli, Alma Mobley, Ann-Veronica Moore, and Anna Mostyn are all the same entity, and that the resurrected Bate brothers serve as her agents of terror. After losing Sears James to a hallucination-induced blizzard crash, the surviving trio of Don, Ricky, and Peter Barnes destroy the Bate brothers at the town movie theater and then kill Anna Mostyn in the Hollow apartment. Don follows the creature's final reincarnation to Florida and destroys the last remnant of the shapeshifter on a beach.

The horror that destroyed the Chowder Society.

Angie Maule smiles and tells Don Wanderley that she is him when he holds a knife behind his back and asks what she is.

Anna Mostyn watches snow fall from her hotel window, smokes a cigarette, and decides the time to act has come.

Ricky Hawthorne has a nightmare in which his dead friends enter his bedroom one by one, waking him screaming.

Lewis Benedikt senses something watching him from the trees as he runs the trails around his estate.

Ann-Veronica Moore floats through John Jaffrey's party and captivates Edward Wanderley and the other men gathered there.

Ann-Veronica Moore vanishes from the party after Edward is found dead, and no one at the party can locate her.

Sears hires Anna Mostyn as a secretary after she walks into the law office claiming that Eva Galli was her aunt.

Lewis flees Humphrey's bar after Anna Mostyn casually mentions that her aunt was Eva Galli.

Milly Sheehan sees John Jaffrey's ghost standing in her yard, warning her to tell the others to leave Milburn.

Jim Hardie and Peter Barnes climb a church bell tower and spy on Anna Mostyn smoking in the dark using a telescope.

Freddy Robinson is killed near an old railroad station after being lured there by Anna Mostyn.

Peter Barnes escapes Lewis's house after Gregory drains his mother Christina's blood and runs to Don Wanderley's hotel room.

Milburn descends into a state of siege with food shortages, violent outbursts among neighbors, and ten residents found dead.

Don plays Edward's interview tapes at Edward's house and hears Ann-Veronica Moore's voice slip without warning into Eva Galli's voice.

Ricky Hawthorne recovers from pneumonia in a Binghamton hospital and tasks Don Wanderley with hunting down and killing the shapeshifter.

While the Chowder Society struggles to understand the evil invading Milburn, the shapeshifter quietly maneuvers through the town's social fabric as Anna Mostyn, leaving a growing trail of victims. She enchants men at John Jaffrey's party and vanishes after Edward's death, then slips into the law office to install herself as a secretary, all while Gregory and Fenny Bate terrorize the countryside. Ricky suffers haunting nightmares, Lewis senses something stalking him in the woods, and Milly Sheehan receives a ghostly warning from the dead John Jaffrey. Teenager Peter Barnes and his reckless friend Jim Hardie spy on Anna Mostyn but Jim does not survive the encounter, and Peter barely escapes Lewis's house after witnessing a brutal attack on his own mother. The town collapses into fear and isolation, and only after listening to the creature's voice on Edward's old interview tapes do the survivors find a path toward stopping her.

The creature moves through Milburn's shadows.

Don Wanderley hallucinates his cremated brother David's headstone appearing in the street during a stop on the drive south.

Ricky walks home from the Chowder Society meeting through the falling snow, feeling cold eyes watching him from the dark.

Sears confronts the local pastor and learns that Gregory Bate physically and sexually abused his siblings before they killed him.

Fenny Bate falls into a trance at the schoolhouse, Gregory appears at the window, and Fenny's heart stops.

Sheep farmer Elmer Scales describes the figure watching his field in terms that match Sears's description of the dead Gregory Bate.

Ann-Veronica Moore tells Stella Hawthorne at the party that she has observed Ricky and that he would make a good enemy.

Stella Hawthorne cuts through the Chowder Society's evasive coded talk and tells Don directly that he must help the men face their fear.

Don connects Anna Mostyn's initials to Alma Mobley's initials and resolves to burn his unfinished manuscript.

Peter Barnes overhears his mother on the phone at a dinner party and realizes she is having an affair with Lewis Benedikt.

Lewis Benedikt steps through an illusory door in the forest and asks his dead wife Linda what she saw in the girl's room when she died.

Don reveals a biography of painter Robert Mobley proving the shapeshifter previously operated as Florence de Peyser and her niece Amy Monckton.

Sears James descends into Anna Mostyn's cellar and encounters the ghost of John Jaffrey, who tells him smilingly that he went over.

Peter Barnes nearly turns his knife on Ricky and Don after a mirror in Anna Mostyn's house shows him a vision of his dead mother.

Don becomes convinced that a young girl he watches on the Milburn playground is the shapeshifter's new host and kidnaps her.

Don crashes his car in Florida, killing the girl Angie, as the shapeshifter abandons her body and transforms to escape.

The story's most crucial turning points emerge through moments of forced reckoning with hidden truths that each character has buried. Sears James learns the full horror of Gregory Bate's abuse from a German pastor, Ricky senses the shapeshifter's cold surveillance from the very first night, and Stella Hawthorne becomes the one who breaks through the old men's evasions to push Don into action. Don makes the critical connection between Anna Mostyn's and Alma Mobley's initials, and later uncovers a painter's biography proving the shapeshifter has operated under many names across decades. Lewis Benedikt's final forest illusion forces him to confront his unspoken guilt over his wife's death, while Peter Barnes is nearly turned into a weapon against his own companions by the creature's mirror magic. These revelations strip away the characters' protective denial, leading Don to identify the shapeshifter's new host, kidnap the girl, and drive south toward a fatal crash that forces the monster into its last desperate transformation.