Girl on the Third Floor

In Ellington, Illinois, Don Koch, a reformed criminal, decides to renovate an old house in hopes of atoning for his past mistakes. His goal is to create a safe and nurturing environment for his pregnant wife, Liz, and their dog, Cooper.

Upon moving into the house, Don encounters Ellie Mueller, the local pastor, who becomes an unexpected source of moral support and guidance for him. Their interactions spark a connection as Don navigates the complexities of his new life.

As Don delves into the renovation, he discovers strange occurrences that hint at the house's dark history. He finds bizarre substances seeping through walls and marbles appearing mysteriously, suggesting that something sinister lurks within.

Don is drawn into a brief affair with Sarah Yates, a captivating neighbor, leading to a passionate encounter in the attic. However, their tryst is interrupted by the collapse of the ceiling, ultimately revealing a chilling secret viewing platform.

Don's former colleague, Milo Stone, arrives to help with the house renovations. Their reunion quickly turns sour as Milo uncovers the betrayal and becomes intrigued by Sarah, putting them all on a path toward chaos.

As Milo investigates further into the house's mysteries, he encounters a horrific fate at Sarah's hands in the basement. Unbeknownst to Don, he believes Milo has simply gone missing.

Disturbed by a growing sense of danger, Liz and Don increase home security in an attempt to protect themselves. Tragically, Sarah lures Cooper, their dog, downstairs with a marble, leading to the dog's death, which devastates Don.

In a fit of rage and grief, Don confronts Sarah and, in a tragic turn of events, kills her in an attempt to hide her body in the basement. Soon after, he is unnerved to find that her body has vanished.

Desperate to understand the house's mystery, Don discovers a secret room in the attic filled with disturbing drawings that connect him to its dark past. His emotions spiral as he uncovers Milo’s severed head, revealing the extent of the horror.

Liz stumbles upon a newspaper article from 1909 outlining the house's sinister history. She experiences a chilling encounter that immerses her in the dark past, revealing a disturbing S&M spectacle linked to Sarah and a masked figure.

In a harrowing revelation, Liz connects with the tragic history of Sadie, a girl victimized by the brothel in their home. Confronted by the spirit of Don, she pleads for understanding amidst the horrors surrounding them.

As the dark influence of the house intensifies, Sarah's malice manifests when she wears Don's skin, creating a nightmarish confrontation. Liz finds the strength to resist Sarah’s manipulative energy and fight back against the oppression.

With Ellie’s insight, Liz recognizes the power of acknowledging their past errors. In a final act of defiance, she lays Sarah to rest, confronting the haunting legacy that plagued the house.

Six months later, Liz embraces motherhood, finding peace as they transform the old mansion into a welcoming home. However, dread creeps back when she discovers her baby alone, and Don’s ghost looms ominously, scattering marbles once again.