The Other (2025) Plot Summary & Ending Explained

In the final act Daniel finally follows the address Kathelia hands him to, a decaying house where the previous foster parents are already being consumed by the same black‑mold, flies and rot that have haunted his own home. The elderly woman, Evelyn, is chained and crawling with maggots, a visual echo of the parasite that has been using each caretaker as a doorway. When Daniel escapes with Kathelia, the couple’s own house erupts into chaos: Robin’s “pregnancy” explodes in a bathtub of blood, revealing not a baby but a malformed, lifeless lump that the doctor later identifies as the same dead twin that resides inside Kathelia’s brain.

Desperate to stop the entity once and for all, Daniel, aided by the psychic Fiona, pulls a drill from the garage and drives it into the hollow of Kathelia’s skull. As the drill bites into the frontal lobe, a pale, half‑formed fetus—its eye blinking with a murderous intelligence—pushes its way out. The creature snarls, trying to latch onto Daniel’s wound, but Kathelia, now able to speak for the first time, snarls back and snaps the newborn’s neck, ending the twin’s reign of terror. The act also liberates Kathelia’s voice; she whispers “sister” one last time, confirming that the mute child had been silenced by the parasitic twin all along.