22nd Calgary Underground Film Festival

April 17-27, 2025

12th CUFF.Docs Documentary Film Festival

November 20-24, 2024


Slovakia, Czech Republic, 2022: 109 minutes: Alberta Premiere
Archives 2023
In Cinema Globe Cinema
Thu, Apr 27 9:00 PM Buy


A young woman returns to her native mountain village, searching for answers about her troubled childhood, but as she tries to uncover the truth, ancient superstitions lead the villagers to accuse her of witchcraft and murder.

In a remote mountain village, two sisters grow up at the mercy of their abusive mother. A terrible accident happens when the eldest, Šarlota, escapes into the woods, and is followed by her sister Tamara. Otyla, a Roma woman living on the outskirts of town, is blamed for the girls’ disappearance and accused of witchcraft. Twenty years later, Šarlota unexpectedly shows up in the village. As she digs into her past, the locals grow suspicious. Only a young and eccentric herbalist, Mira, is willing to befriend her. When the animals in the village start to fall ill, the locals accuse Šarlota of conjuring Otyla's spirit. This Slovak folk horror has won awards from multiple major festivals including Sitges Film Festival and Locarno International Film Festival.

Locarno Film Festival 2022
MOTELX - Lisbon International Horror Film Festival 2022
Fantastic Fest 2022
Vancouver International Film Festival 2022
Boston Underground Film Festival 2023

Tereza Nvotová's sophomore feature, NIGHTSIREN (2022), premiered in Locarno IFF - Cineasti del presente, where it won the Pardo D'Oro (Golden Leopard) for the Best Film. Her debut feature, FILTHY (2017), premiered at IFF Rotterdam and has won many awards at festivals worldwide. HBO Europe co-produced her feature debut and two documentaries. Her latest HBO documentary THE LUST FOR POWER (2017) was critically acclaimed and has caused heated debate about populism and corruption in politics. She lives between Prague and New York.

press for Nightsiren

"NIGHTSIREN is a bewitching film that will hopefully work its magic on countless horror audiences to come."
- Austin Chronicle
"Nvotová and co-writer Barbora Namerova smartly deploy the witchy elements in this slow-burn chiller to explore themes of violence and misogyny."
- The Upcoming


Narrative / Horror / Drama / Mystery / Woman Director

Slovak | English Subtitles
109 minutes


Tereza Nvotová

Miloš Lochman

Barbora Námerová
Tereza Nvotová

Federico Cesca

Natalia Germani
Eva Mores
Juliána Brutovská
Iva Bittová

Official website:



Winner, Golden Leopard - Filmmakers of the Present, Locarno International Film Festival 2022
Winner, Best Feature Length European Film, Sitges Film Festival 2022
Winner, Best Actress, Sitges Film Festival 2022