October 2001. Two inmates escape from the Lleida prison after months of carefully planning their breakout, triggering a nationwide manhunt and putting the entire country on alert. The Mossos d'Esquadra, a newly established police force, come under intense scrutiny from other law enforcement agencies that question their experience. As the search becomes increasingly difficult, criticism, frustration, and despair begin to take their toll on everyone involved. During the investigation, the police uncover the unusual bond between Prieto, a ruthless criminal, and Calatrava, a vulnerable and intelligent drug addict whom Prieto ultimately protects, even at great personal risk. Their escape reveals a complex relationship built on loyalty, admiration, and dependency—one so intense that it leads to an unexpected ending.

The fugitives have been on the run all night and are exhausted, but Prieto insists on reaching Porquerisses, where his family's storage shed holds hidden supplies. Pau, the Chief Inspector, gathers his team to coordinate the search for the escapees and monitor their relatives. With the help of a prison social worker, investigators learn that the inmates are betting on where the fugitives will head. They also discover that Calatrava once attempted suicide and that Prieto saved him—not only from death, but also from Ortiz, a violent inmate who had been preying on him. The Mossos locate the storage shed described in the letters and decide to keep it under surveillance, convinced that the fugitives will eventually return.

On Wednesday, October 17, the fourth day of the manhunt, the Mossos discover the dead wild boar, and ballistic tests confirm that the weapon used belonged to the wounded officer. Based on where the animal was found, investigators conclude that the fugitives have slipped through Operation Cage and may already be heading toward Barcelona. Prieto's ex-wife calls Julián, her former brother-in-law, convinced that he and Olmedo know where the escapees are hiding. What she doesn't realize is that the Mossos have tapped her phone, giving investigators a crucial lead. Thanks to Moyano's contacts within the Civil Guard, they identify Olmedo. Meanwhile, Irene, the police officer wounded during the escape, is discharged from the hospital and asks the inspector to let her rejoin the team.

The Mossos tighten the net around Olmedo and the fugitives as Calatrava's health continues to deteriorate, prompting Prieto to do everything he can to protect him. But when a police operation goes wrong, the escapees seize the opportunity to slip away once again.

The fugitives attempt to steal a parked car during their escape, but the driver is killed, his girlfriend is left handcuffed, and the vehicle is riddled with bullets after Prieto opens fire recklessly. The National Police discover the young man's body inside the bullet-ridden car, and Chief Santillana assigns Inspector Vinuesa to the case. Pau meets with Santillana, the head of the National Police, but becomes frustrated by the lack of cooperation. His concern deepens when he learns that Alfonso, the young man who was killed, is related to a police officer. News that the fugitives are suspects in the Collserola incident is leaked to the press. Calatrava then discovers that the young woman was sexually assaulted, an unexpected revelation that marks the beginning of the end. It is Thursday, November 15, 2001, and the fugitives have now been on the run for 33 days.

News of the murder and sexual assault sends shockwaves through the victims' families and also reaches Olmedo, who is still tormented by Calatrava's blackmail. When Rosario confronts him, reminding him that prison is the best place for her ex-husband, he decides to turn himself in and identify the fugitives. With Pau leading the operation, the Mossos prepare an ambush at the agreed meeting point. Clara uncovers a possible leak within the Mossos and spreads false information to mislead the National Police, but once the deception is exposed, the rivalry between the two forces threatens the entire operation. Prieto discovers Calatrava's betrayal when he realizes they are surrounded and his gun is out of ammunition. Four years later, Inspector Moyano recounts the events to Carles Porta, the documentary filmmaker who has spent years gathering testimonies from everyone involved.