Chino, Àlex Monner is the injured man pursued through a forest at night, a tense opening that hints at the brutal consequences to come. The story then centers on Martín Javier Gutiérrez, a police officer starting a night shift driving a prisoner transport, who teams up with Montesinos Isak Férriz. The pair’s job quickly curdles into something darker: Montesinos openly humiliates some of the prisoners during the transfer, but Martín steps in to shield the inmates from overt violence, setting up a moral clash you feel long after the scene ends.
As they push forward, fog blankets the road, cutting radio contact with the escorting car. A spike strip on the highway halts their journey, and Montesinos goes to investigate, only to vanish. When Martín follows, he discovers the other police car overturned and the officers dead, leaving him isolated with the remaining prisoners.
A sniper opens fire, and Martín is struck in the leg. He crawls back to the transport and takes refuge among the prisoners. One inmate breaks free and makes a desperate bid to overpower him, but Martín defends himself and regains control. In a desperate bid to slow their pursuers, gasoline is poured into two cells and set alight through the ventilation grilles, forcing Martín to unlock the doors to rescue the inmates—though tragedy strikes when one man dies in the blaze.
The freed prisoners start a chain reaction, releasing others and broadcasting a taunting intercom message that Martín’s gun is apparently empty and that they should escape. Amid the chaos, Nano commits a brutal murder to lay claim to the key, acquiring it from Martín and complicating the already dire situation.
Miguel, the hijacker, takes hold of the transport and threatens to kill everyone unless Nano is handed over. A brutal struggle for the key ensues, but Nano swallows it rather than surrender it. The tensions threaten to explode as Miguel pushes the vehicle onward, while their captives scramble for a way out.
In a further twist, Rei hides in a storage compartment under the truck, trying to access a panel, as Montesinos—who has revived after a prior apparent death—pursues the vehicle after finding Miguel’s jeep full of photos of his missing daughter. A dramatic chase ends when Montesinos is forced off the road and killed in a collision, and Rei dies in the storage space, impaled by a screw as the truck swerves.
Martín presses Nano for answers and learns of a blunt, painful truth: Nano speaks of someone named Chino, his childhood friend, drawing a direct line back to the dark past that binds the characters. The truck is driven onto a frozen lake and then sinks when Miguel shoots the ice, leaving him to walk away as chaos erupts behind him. Rei’s death and Golum’s chilling fate—Golum, Andrés Gertrúdix meeting his end in the cold—underscore the film’s brutal environment.
Martín, Ramis, and Nano manage to escape, with Golum dying from the cold as they race against time and elements. Martín reaches a nearby village, where gunfire breaks out again between Miguel and Nano. Miguel reveals the root of his vendetta: he believes Nano and Chino were responsible for a harrowing crime that touched his own daughter in a devastating way. The revelation reframes the entire night with a vengeance-filled motive and hard choices.
A tense confrontation unfolds as Martín refuses to let Miguel kill Nano. The struggle for the shotgun ends with Martín in control, but Miguel continues to pursue Nano. A critical moment comes when Nano, wounded, yields a confession: his accomplice Chino and Nano buried Miguel’s daughter in a well on a farm. As a police rescue helicopter finally arrives, the weight of the night’s violence sits squarely on Martín’s shoulders.
In the final beat, Martín collects his belongings from his locker at headquarters and walks away from the building, signaling the end of his police career and leaving the fate of the night to be spoken of in whispers and memory.