Dafne Keen Awakens Evil with Aztec Artifact in "Whistle" Horror Trailer

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A first teaser for the horror film "Whistle" has dropped on YouTube — and it's definitely not for the faint of heart. Starring Dafne Keen, who many will remember from "Logan".

Her character finds a strange skull inside a vase, and with it — an ancient Aztec curse that starts picking off her classmates one by one.

What the teaser shows

From the opening frames, it's clear: this isn't just another teen school horror flick. In the footage, Dafne Keen's character holds a strange vase containing a skull-shaped object that turns out to be a whistle — one that unleashes ancient evil into the world as people burst into flames and writhe in agony.

The film's plot

A group of high schoolers accidentally discovers an ancient Death Whistle — an Aztec ritual artifact that, as it turns out, doesn't just make noise. Its sound conjures ghostly visions of each person's own death, and then death itself starts hunting them down.
Metal skull, on the right actress Dafne Keen in a green jacket holds this skull in her hands
Frames from the "Whistle" teaser
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The characters die off one by one while the survivors desperately try to figure out: what is this artifact, where did it come from, and how can they stop the escalating nightmare? It's got the spirit of classic teen horror like "I Know What You Did Last Summer," but with a dose of Latin American mythology.

Who's behind the project

The film was directed by Corin Hardy, who helmed "The Nun" and worked on "Gangs of London" — so expect plenty of spectacle and bloody thrills. The screenplay was written by Owen Egerton, based on his own short story.
"Whistle" movie trailer
Alongside , the cast includes Percy Hynes White ("Wednesday"), Nick Frost ("Hot Fuzz"), and Sophie Nélisse ("The Book Thief," "Yellowjackets").

Why it's worth the wait

First, the concept is built around a real mystical object: Aztec "death whistles" actually existed and were used to terrorize enemies.

Second, the trailer already hints at original, inventive death scenes.

And third, the director and cast give hope that "Whistle" will be a 2026 season hit — especially for fans of the genre who love teen adrenaline mixed with ancient evil. Earlier, we at zoomboola.com broke down the first trailer for "Avatar 3: Fire and Ash," which showed the Ash tribe and mind-blowing graphics.