“She’s here.”
Deep in the Amazon rainforest, a medical mission becomes a desperate fight for survival when an enormous ancient predator awakens and begins reclaiming her territory in Beware Boiúna, the upcoming horror thriller from director Mike P. Nelson.
Starring Kiana Madeira, Jessica Rothe and Logan Marshall-Green, the film plunges its characters into an environment where nature is no longer simply dangerous—it is the enemy.
Lionsgate will release Beware Boiúna exclusively in theatres on October 2, 2026.
A Medical Mission Turns Into a Nightmare
The story takes audiences deep into the Amazon, where a medical mission quickly spirals out of control.
What the group encounters is something far beyond the dangers they anticipated.
Boiúna, a colossal ancient predator, has awakened and returned to her domain. In an environment where humans are far from being at the top of the food chain, survival becomes a matter of instinct, courage and luck.
The deeper the characters venture into the jungle, the more they discover that this is Boiúna’s territory.
And she decides who lives—and who dies.
Meet Boiúna
At the centre of the film is the legendary creature itself: Boiúna, portrayed as a massive ancient predator capable of turning the Amazon into a terrifying hunting ground.
The film’s premise taps into one of horror’s most primal fears—the realization that humans can become prey.
The Amazon provides an especially effective setting for this kind of survival horror. Dense jungle, waterways and seemingly endless wilderness create an environment where danger can come from almost anywhere.
When that environment is controlled by a gigantic predator, escape becomes considerably more difficult.
Jessica Rothe and Kiana Madeira Lead the Fight for Survival
The cast includes Kiana Madeira, Jessica Rothe and Logan Marshall-Green, bringing a strong combination of horror, thriller and dramatic experience to the film.
Madeira is particularly familiar to genre audiences through her work in Fear Street, while Rothe has become closely associated with horror through the Happy Death Day franchise.
Their involvement makes Beware Boiúna an appealing prospect for horror fans looking for a creature feature with recognizable genre talent at its centre.
Mike P. Nelson Directs
Beware Boiúna is directed by Mike P. Nelson, who has established himself as a filmmaker working within suspense and horror.
The screenplay comes from Alan McElroy, based on a story by Tony Giglio and Alan McElroy.
The film is produced by Jeremy Bolt and Robert Kulzer.
Everglades Experiential Press Day
The film’s promotional campaign also includes Everglades experiential press day footage featuring Jessica Rothe, Kiana Madeira and director Mike P. Nelson, offering fans a closer look at the cast and filmmaker ahead of the theatrical release.
The experiential material provides an intriguing extension of the film’s survival-horror atmosphere as audiences prepare to enter the world of Beware Boiúna.
Beware Boiúna Cast & Crew
Cast:
- Kiana Madeira
- Jessica Rothe
- Logan Marshall-Green
Director: Mike P. Nelson
Screenplay: Alan McElroy
Story: Tony Giglio and Alan McElroy
Producers: Jeremy Bolt, Robert Kulzer
Genre: Suspense / Horror
Rating: R — bloody violent content, some grisly images and language
Runtime: 104 minutes
U.S. Release: October 2, 2026
Production: Lionsgate presents a Constantin Film/JB Pictures production, in association with North.Five.Six.
A Creature Feature Built for the Big Screen
There is something particularly effective about placing a giant monster in an environment where escape is already difficult.
Unlike a traditional urban creature feature, Beware Boiúna places its characters deep within the Amazon, where isolation becomes part of the horror. There are no easy exits and no guarantee that help can reach them.
The result looks to combine creature horror, survival thriller and jungle suspense, with Boiúna transforming the natural environment into a gigantic hunting ground.
And with an R rating for bloody violence and grisly imagery, audiences can expect the film to embrace the more brutal side of creature-feature horror.
Final Thoughts
Beware Boiúna takes the classic creature-feature formula and drops it into one of the world’s most intimidating natural environments.
A medical mission.
An ancient predator.
An unforgiving jungle.
When Boiúna awakens, the people trapped in her territory aren’t simply trying to survive the Amazon—they’re trying to survive her.
She’s here.
Beware Boiúna is ONLY IN THEATRES October 2, 2026.
