While the police suspect Ellie has simply run away, Keira becomes obsessed with the strange symbols and mathematical equations carved into the stone above the doorways. Her investigation reveals:

The family’s nightmare begins when their teenage daughter, Ellie, goes missing during a power outage. While home alone with her younger brother Steven, Ellie is forced to go into the dark cellar to reset the fuse box. Guided by her mother over the phone, she is told to count the ten steps down to soothe her fear. However, as she reaches the bottom, the counting continues—reaching steps that shouldn't exist—and she vanishes into the darkness. The Investigation

The story reaches a climax when Steven also vanishes, pulled into the cellar by the same force. Keira realizes the cellar steps have transformed into an infinite, recursive staircase. Descending into this rift, she enters a lifeless, grey dimension where a vast crowd of "lost" people mindlessly count numbers for eternity. SXSW Film Festival 2022: The Cellar

: Objects found in the house, including an old phonograph playing a rhythmic counting, act as keys to activate the cellar's true nature. The Descent

: The house was built by a scientist and occultist who used non-Euclidean geometry and "satanic math" to create a gateway to another dimension.

In the 2022 supernatural horror film , Keira Woods ( Elisha Cuthbert ) and her family move into a sprawling, remote mansion in the Irish countryside, only to realize that their new home holds a mathematical and demonic secret. The Disappearance

: The symbols form a pentagram associated with Baphomet , an ancient demonic entity that claims the souls of those who enter its realm.