AceShowbiz - Undertone is a 2026 horror sensation that has captivated audiences with its unique sound-driven terror and minimalist storytelling. Directed by Ian Tuason, the film debuted in March following a critically acclaimed festival circuit and secured a distribution deal with A24. Its marketing campaign boldly labeled it as "the scariest movie you'll ever hear," a strategy that paid off handsomely with a $9.3 million opening weekend box office on a modest $500,000 budget. The movie’s domestic run ultimately surpassed $18 million, sparking vibrant discussions about the innovative use of sound in horror cinema.

The story centers on Evy, played by Nina Kiri, a paranormal podcast host who returns to her childhood home to care for her comatose mother. While there, Evy receives mysterious audio recordings chronicling the terrifying experiences of a married couple, Jessa and Mike, portrayed by Keana Lyn Bastidas and Jeff Yung. Their encounter with the demon Abyzou evolves from unsettling curiosity to a harrowing ordeal. The film’s narrative and auditory approach led to intense debates among viewers and social media communities, earning it status as a beloved low-budget, high-concept gem within the horror genre.

In a recent interview with Phantasmag, Tuason revealed that the upcoming follow-up will explore the story of Mike and Jessa in depth, confirming the next installment as a prequel. "I won’t say much, but the next one is the story of Mike and Jessa," he stated, indicating a shift away from Evy’s podcast into the direct experience of the recorded nightmare that ignited the original tale. This prequel is part of a planned trilogy, with Tuason hinting that discussions with A24 are underway to make the third film a reality. Though details about the final chapter remain under wraps, the filmmaker expressed a desire to resolve some of the unanswered questions left deliberately open in the first movie.

The critical acclaim that elevated Undertone to cult status is rooted in Tuason’s disciplined and innovative filmmaking. The film is set predominantly in a single location and features visible performances almost exclusively from Kiri. All other characters are heard only as voices, compelling the audience to use their imagination to fill in the visual gaps. Rather than relying on traditional jump scares, the film weaponizes sound and psychological tension, creating a horror experience that transcends conventional monster tropes or clearly visible threats.

The film’s thematic depth is also noteworthy. Evy’s pregnancy and the audio files depicting a mother tormented by Abyzou—a demon from Jewish and Middle Eastern folklore known for targeting children—combine with the presence of Catholic iconography surrounding Evy’s own ailing mother upstairs. Tuason refrains from explicitly connecting these elements, trusting viewers to intuit the underlying significance and emotional weight. This restraint contrasts sharply with modern horror’s frequent reliance on third-act exposition to clarify scares, instead favoring atmosphere and ambiguity.

This approach contributed significantly to the film’s passionate word-of-mouth success, allowing Undertone to transcend its indie origins. The film’s open-ended narrative, coupled with its immersive sound design and psychological depth, created a cultural conversation about the power of sound in horror storytelling.

Fans are now eagerly anticipating the prequel that will delve into the chilling backstory of Jessa and Mike’s encounter with Abyzou. The forthcoming film promises to expand the eerie world Tuason has crafted, offering answers to some of the mysteries that have intrigued audiences since the original release.

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