Beware Boiúna Plot: What the Story Is About
A humanitarian medical mission heads into the remote Amazon rainforest, where help is far away and the jungle sets its own rules. Among the people caught up in the trip are Brennan Malloy, Lena and Alli, along with a mix of fellow travellers and locals including Shawn, Miguel, Callum, Pedro, Raúl, Diego and Guilherme.
Their work is soon overshadowed by something far older than any of them. Boiúna, a gigantic serpent rooted in Brazilian folklore, stirs from the depths of the rainforest and treats the region as her territory. What began as a mission to help others becomes a desperate effort to stay alive, with the group forced to rely on each other in surroundings where they have little control.
The film blends creature-feature thrills with survival horror. Its tagline, “Witness terror on a gigantic scale,” points to the size of the threat, while the setting adds isolation, dense terrain and a constant sense that nature is in charge. The story is told in English and Portuguese, which grounds the outsiders’ journey in its South American setting.

What Makes Beware Boiúna Notable: Cast, Director and Origins
- Director: Mike P. Nelson
- Writer: Alan B. McElroy
- Main cast: Logan Marshall-Green as Brennan Malloy, Kiana Madeira as Lena and Jessica Rothe as Alli, with Jackson Bews, Juan Pablo Shuk, Will Close, Vicente Peña, Jaime Newball, Mateo Moreno and Nelson Camayo.
- Genre: Horror and thriller, specifically an animal-attack creature feature.
- Origin: An international co-production from the United States, Germany and Colombia, with Constantin Film, JB Pictures, Jaguar Bite and North.Five.Six. among the companies involved.
- Runtime: 104 minutes (1 hour 44 minutes).
The monster itself is a big part of the appeal. Instead of an invented beast, the film draws on the Boiúna, a giant snake figure from Brazilian folklore, and places it in an Amazon survival story. That mix of legend and jungle peril sets it apart from creature films set in cities or at sea.
Beware Boiúna Review Guide: Who Will Enjoy It
This page offers no verdict. Here is what to expect so you can decide if it suits you:
- Fans of giant-creature and animal-attack films, especially snake-centred horror
- Viewers who enjoy survival stories set in harsh, isolated places
- Audiences curious about Brazilian folklore and Amazon rainforest settings
- Thriller lovers who like ensemble casts under constant threat
- Mature viewers comfortable with horror content suited to an R-16 classification
Release Date in the Philippines and Where to Watch
Worldwide: Beware Boiúna had its first release on 1 October 2026.
Philippines: The film opened in Philippine cinemas on 14 October 2026 with an R-16 classification. It is limited to viewers aged 16 and above.
Streaming in the Philippines: A streaming, rental or purchase option for the Philippines is not yet listed in TMDB/JustWatch data as of 24 October 2026. For now, cinemas are the listed way to watch it locally.
Trailer: An official trailer has been released, so you can preview the film’s tone and its giant serpent before buying a ticket.
Trailer
Cast
Logan Marshall-Greenas Brennan MalloySee credits →
Kiana Madeiraas Lena
Jessica Rotheas Alli
Jackson Bewsas Shawn
Juan Pablo Shukas Miguel- Will Closeas Callum
- Vicente Peñaas Pedro
- Jaime Newballas Raúl
Photo: TMDB
FAQ
- When is the Beware Boiúna release date in the Philippines?
- Beware Boiúna opened in Philippine cinemas on 14 October 2026. Its first worldwide release was on 1 October 2026.
- Where can I watch Beware Boiúna in the Philippines?
- The film has a theatrical release in the Philippines, so you can watch it in cinemas. A streaming or digital option is not yet listed in TMDB/JustWatch data as of 24 October 2026.
- Who is in the cast of Beware Boiúna?
- Logan Marshall-Green plays Brennan Malloy, Kiana Madeira plays Lena and Jessica Rothe plays Alli. Jackson Bews, Juan Pablo Shuk, Will Close, Vicente Peña, Jaime Newball, Mateo Moreno and Nelson Camayo also appear. Mike P. Nelson directs from a script by Alan B. McElroy.
- What is the plot of Beware Boiúna?
- A humanitarian medical mission in the Amazon turns into a fight for survival when Boiúna, a colossal serpent from Brazilian folklore, awakens and claims the rainforest as her own.
- How long is Beware Boiúna and what is its rating in the Philippines?
- The film runs 104 minutes (1 hour 44 minutes). In the Philippines it is classified R-16, which means it is for viewers aged 16 and above.

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