undertone (2026) Spoiler-Free Summary – What It's About

Living a solitary existence defined by the rhythmic hum of medical equipment and the weight of a Catholic upbringing, Evangeline "Evy" Babic occupies a space between the mundane and the macabre. She spends her days caring for her comatose mother and her nights co-hosting "The Undertone," a popular paranormal podcast. While her co-host, Justin, dives headfirst into the supernatural with genuine belief, Evy stands as the skeptical voice of reason, dismissing the stories they cover as hoaxes and fabrications—until the stories start hitting too close to home.

The static of the digital world brings a disruption to Evy's carefully ordered life when an anonymous email arrives, bearing a collection of audio files that promise a new topic for the show. The recordings document a couple attempting to capture strange occurrences in their sleep, but the content proves far more disturbing than standard paranormal fare. As Evy and Justin analyze the tracks, the audio reveals layers of menace that defy easy explanation, hinting at a darkness that listens and watches from just beyond the veil of perception.

What begins as professional curiosity soon warps into personal terror as the boundaries between the podcast and Evy’s reality begin to erode. The atmosphere in her home grows thick with unexplained phenomena, suggesting that the entity or force captured on the tapes has taken a specific interest in the host. Haunted by the terrifying implications of the recordings, Evy must navigate a growing sense of dread that challenges her skepticism and threatens to upend the fragile balance she maintains in her isolated life.