‘Undertone’ Trailer: A Supernatural Podcast Goes Awry in A24’s Latest Nightmare

Ian Tuason's feature debut, which wowed audiences at Fantasia in 2025, is heading to Sundance before opening wide in March.

Every year marks the arrival of at least one indie horror filmmaker who seemingly emerges from out of nowhere to become a household name. In 2026, that name just might be Ian Tuason, whose debut feature “Undertone” earned him a distribution deal with A24 and a prime spring release date. The film explores the dark side of supernatural podcasts, following a host who receives a series of suspicious recordings that suggest her skepticism about the occult could be misguided.

“Undertone” premiered at the 2025 Fantasia Film Festival, with A24 acquiring distribution rights soon after. It will next screen at the 2026 Sundance Film Festival in the midnight section. Other films in the section include “The Best Summer,” “Buddy,” “Leviticus,” “Mum, I’m Alien Pregnant,” “Rock Springs,” and “Saccharine.”

A synopsis of the film from the Sundance program reads: “Strained by the responsibility of providing end-of-life care to her dying mother, Evy (Nina Kiri) seeks respite from the loneliness of her fragmented reality. Now living in a house full of sentimental keepsakes and memories, her sanity and structure lies within her work on a supernatural podcast, ‘The Undertone.’ While she usually plays skeptic to the creepy (and often disturbing) audio files sent to her by co-host Justin (Adam DiMarco) for podcast fodder, the latest submission hits differently. A series of 10 unheard recordings from a young pregnant couple are unfurled one by one, each more ominous than the last. As Evy draws parallels to her current plight, hidden messages manifest, pushing her further toward madness.”

The film, which is written and directed by Tuason, stars Nina Kiri, Adam DiMarco, Michèle Duquet, Keana Lyn Bastidas, and Jeff Yung. Dan Slater and Cody Calahan serve as producers.

Regardless of how “Undertone” performs, it appears that the film industry is already bullish on Tuason. He was announced in December as the director of a new “Paranormal Activity” reboot being produced by Blumhouse-Atomic Monster for Paramount. His film will mark the eighth entry in the long-running found footage series.

A24 is set to release “Undertone” in theaters on Friday, March 13. Check out the film’s first trailer below.