Trama

An assassin-for-hire finds that he's become a target after he refuses to complete a job for a dangerous criminal organization.

Alex Lewis (Liam Neeson) is an expert assassin with a reputation for discreet precision. Caught in a moral quagmire, Alex refuses to complete a job that violates his code and must quickly hunt down and kill the people who hired him before they and FBI agent Vincent Serra (Guy Pearce) find him first. Alex is built for revenge but, with a memory that is beginning to falter, he is forced to question his every action, blurring the line between right and wrong.

Alex Lewis is a contract killer living in Mexico who suffers from early-onset Alzheimer's and works for Davana Sealman. He is assigned to kill a man in El Paso, Texas, where he grew up and where his brother lives in residence at a nursing home due to severe Alzheimer's disease. The target of the hit is Ellis Van Camp, a builder for the Texas Central Processing Facility. Meanwhile, Vincent Serra of the FBI's Child Exploitation Task Force is undercover in El Paso trying to arrest "Papa Leon," a sex trafficker. Vincent kills Papa Leon after the latter takes his daughter Beatriz hostage during the sting operation. Beatriz is taken to the Processing Facility, where she had been held previously, before ending up at a group home. Vincent is frustrated that his domestic investigations into trafficking are frequently foiled.

Alex kills Ellis and steals a flash drive from his safe. He finds out his second target is Beatriz, but after breaking into the group home, refuses to kill her as he believes children are "off limits." He threatens William Borden, Davana's lawyer, asking him to cancel the contract on Beatriz. Instead, she is killed by another hitman, Mauricio. The next morning Alex wakes in a hotel room after a one-night stand and sees news of Beatriz's murder. He realizes he is in danger and tells Maya, the woman he is with, to stay in the room before heading for the parking garage. He and Mauricio get into a shootout, during which Maya is killed as she had followed Alex to return his forgotten Alzheimer pills. Alex kills Mauricio and burns both bodies inside Mauricio's car, and later goes to kill Borden.

Alex retreats to a former bakery once owned by his late father where he reviews the stolen flash drive and finds footage of Davana's son, Randy, sexually assaulting Beatriz. Randy panics after learning of Borden's death. Davana tells her son to escape, but he first throws a party on his yacht. Vincent and his team, Mexican police detective Hugo Marquez, and Special Agent Linda Amistead, are investigating the Van Camp murder and realize that the recent crimes are connected because Van Camp and Borden were shot with bullets from the same suppressed pistol. They find out that Randy is the owner of the Processing facility, Van Camp was the builder, and Borden was Randy's lawyer, realizing that Randy is likely next.

The FBI arrive at the yacht party to save Randy, but Alex kills him first. Outside, he is cornered by Vincent and Marquez but escapes despite Marquez shooting him. Alex recovers inside the bakery but his Alzheimer symptoms are worsening. Narrowly avoiding an FBI raid, Alex infiltrates Davana's penthouse which is heavily guarded by corrupt El Paso police. He shoots his way past several police officers and reaches Davana but forgets that he had removed the firing pin from his pistol and is knocked out by Davana's henchman, Danny Mora. Mora brings him in alive to interrogate him about the flash drive but another officer tells Mora that Alex needs to be taken to the hospital.

Vincent, Hugo, and Linda receive a package mailed by Alex containing the flash drive. They find Alex under police custody in the hospital where he tells them that he has evidence of Davana threatening Van Camp but cannot remember where he placed the recording. Davana blackmails her personal doctor into killing Alex, but Alex apprehends him and takes him hostage. The police arrive on scene and mistakenly shoot the hostage, but Alex makes it inside Vincent's car, telling him Davana wishes to bury this (spelling "bury" as "b-e-r-y") before stepping out and being shot dead. Vincent later realizes "b-e-r-y" were the remaining four letters of the sign on the outside the bakery where Alex hid. He finds the recording of Davana threatening Ellis, but is told by the district attorney that the tape is not enough to prosecute. Vincent is told to take some time off. Soon after, Marquez kills Davana by slitting her throat; Vincent and Linda see the news report of her death at a bar. Vincent realizes that Linda took him out to give him an alibi. (thanks to Wikipedia)