Beware Boiúna (2026)

Deep in the Amazon rainforest along the Curuçá River, riverboat captain Raúl guides doctors Miguel, Alli, and Callum on a humanitarian mission to provide medical aid to various Colombian riverside villages. The boat's mechanic, Raúl's adopted daughter Lena, uses the trip as an opportunity to search for her brother Jorge, who has gone missing in the jungle after leaving to document illegal mining in the area. At one village, the group encounters a survey team led by brothers Brennan and Shawn Malloy whose goal is to search for areas of the jungle with potential for road site development. Incensed by their assignment, Alli attempts to strand the Malloys' boat in the river but is caught by Shawn, who attempts to rape her in revenge. Lena happens upon the scene and helps Alli fight back, causing Shawn to fall and fatally smash his head on the dock. Lena and Alli subsequently dump his body in the river to frame it as an accident.

After the doctors leave the village, Brennan and his team discover Shawn's body and learn what happened from a young village boy who witnessed his killing. Brennan contacts the doctors' boat about Shawn's death, forcing Lena and Alli to reveal their involvement, though Miguel affirms that they killed Shawn in self-defense and refuses to turn around. The doctors soon stop at another village which they find to be abandoned. Lena, Alli, and Miguel venture into the nearby jungle to search for the residents and discover the mutilated corpse of a man whom Miguel determines was likely digested and then spit back out by an animal.

The trio are soon attacked by Boiuna, a giant, mythological snake, who drags Miguel away and kills him. When Lena and Alli return to the dock, they find Brennan and his men have arrived and taken Raúl and Callum hostage in revenge for Shawn's death. Boiuna attacks the group moments later and Brennan's men are all killed in the ensuing chaos while Callum is accidentally shot and mortally wounded. Lena, Alli, and Raúl attempt to flee on the riverboat, but Boiuna kills Raúl before overturning the boat and devouring Alli. After Lena returns to land, Callum dies of his wounds while Boiuna chases Lena and Brennan into the jungle.

Lena and Brennan encounter two masked men, one of whom is revealed to be Jorge, who explains that he's joined a local militia dedicated to sabotaging and exposing illegal development projects in the jungle. Boiuna returns and kills Jorge's companion while the remaining trio are split up. As night falls, Lena happens upon a vacant mining site and attempts to trap Boiuna with a grapple truck, but Boiuna evades the trap and tries to crush Lena in the operator's cab. Brennan arrives and cuts open part of Boiuna with a chainsaw, only for Boiuna to turn her attention to him and devour him. Lena, thoroughly exhausted, accepts her fate and stares directly at Boiuna, though Boiuna, seemingly recognizing Lena as a worthy adversary, ignores her and leaves. Jorge and his men arrive and reunite with Lena, who thereafter joins them on a mission to kidnap illegal developers in the jungle and leave them tied up as food for Boiuna.