The film opens in Mexico City, where a team of police officers bangs on the door of an apparently abandoned house. Ulises and a partner push inside and discover arcane sigils and grisly evidence of animal and human sacrifices. They are ambushed by the residents, and Ulises is forced to witness the horrific ritual: his partner’s eyes are torn out and he is decapitated. A gunshot to the leg leaves Ulises alive, but traumatized, carrying a grim warning to stay out of their way.
A year passes, and a new trio of protagonists—Ed, Henry, and Phil—have just graduated from Texas and are enjoying a carefree beach bonfire in Galveston. They decide to sneak a week-long trip into Mexico to chase fast-earned thrills, drawn by the temptation of late-night strip clubs and a lax sense of law enforcement. Ed forms a connection with a bartender named Valeria, after defending her in a bar fight, and quickly falls under her spell; Henry, meanwhile, nudges Phil toward his first sexual experience with a young prostitute. Phil, raised as a pastor’s son, hesitates at first, staring at a crucifix on a wall that makes him question his impulses.
The friends, Valeria, and her cousin Lupe drift into a carnival night fueled by hallucinogens. Their revelry is interrupted when Phil, swept up in the moment, irritates a carnival-goer into anger. That rival turns out to be the same man who tortured Ulises’ partner years earlier, and Phil is persuaded to accept a ride home from him. The moment Phil steps into the car, danger closes in.
When morning comes, Ed and Henry realize Phil never returned. They set out to find him and uncover a chilling atmosphere of fear that grips the local authorities and townspeople alike. Ulises joins the investigation, revealing that a human-sacrifice cult is holding a captive young man who matches Phil’s description. As Henry hurls a crowbar at a suspicious truck, he is wounded, and a doctor provides him a protective crucifix as he voices growing dread about the cult’s reach. Phil’s captors prepare him for a grisly fate—he is kept in a shack on a ranch under the watchful eye of Randall, an American serial killer aligned with the cult.
Randall further explains their dark philosophy, invoking “some African voodoo” called Palo Mayombe and a Nganga—a cauldron containing the spirits of the dead. Their plan is to perform a sacrifice on a gringo to empower the Nganga and to help smuggle drugs across the border by rendering them invisible to border guards. The tension peaks as Henry is slain on the rooftop by machete-wielding assailants, and Ed and Valeria decide to confront the abductors with Ulises by their side.
Phil endures a brutal ritual designed to extract screams for the Nganga’s power. He endures a halting prayer as Santillán—Santillán—begs their god Chango to hear him. When the cries fail to satisfy the dark ritual, Santillán resorts to tearing out Phil’s tongue, but it proves too late: Phil is decapitated to fuel the Nganga’s power. Ulises bursts in and kills Santillán, an act that shatters the cult’s hold and allows Ulises, Ed, and Valeria to flee.
The trio flee toward safety, seeking shelter at a remote house where Ulises bleeds out. Randall and the remaining cult members pursue them in stunned disbelief at the fall of their “god.” In a final act of courage, Ed and Valeria, aided by Ulises’s sacrifice, fight back against the cult and cross the Rio Grande in a desperate bid for freedom.
The film closes with a stark caption detailing the aftermath: several kilos of cocaine were found in containers along with human hair; more than fifty bodies were exhumed from a mass grave at the ranch; Ed and Valeria were questioned after their river crossing; and yet more suspects remain at large, suggesting the operation runs deeper than anyone anticipated.
This raw, tense thriller blends a road-trip premise with a chilling dive into a violent underground cult, balancing brisk action with fear-inducing atmosphere. The performances—led by Ulises, Randall, Ed, Henry, Phil, and Valeria—ground the escalating peril with human stakes, keeping the focus on loyalty, survival, and the thin line between bravado and vulnerability as the story hurtles toward a brutal, unforgettable finale.
