The film begins with Ray King, portrayed by J.K. Simmons, who is enjoying a night out at a bar during a bingo event. Suddenly, a young woman named Anaïs, played by Daniella Pineda, approaches him. Unbeknownst to Ray, men working for a dangerous character named Burke are monitoring their interaction. Ray shows Anaïs a photo of a family from El Salvador, the Sanchezes, leading her to mistakenly think he wants her to harm them. Instead, he explains that he needs her help to locate them because he was hired by the husband of the wife, Edith. As tensions escalate, Ray senses the men closing in on them and attempts to escape the bar. In a tense confrontation, he fights and ultimately kills two of Burke's henchmen, but is tragically gunned down while fleeing.
In the aftermath of Ray’s death, Marybeth Medina, played by Cynthia Addai-Robinson, a Treasury agent, goes to the morgue to identify him. There, she discovers an ominous note on Ray’s arm that reads “find the accountant.” Meanwhile, Christian Wolff, portrayed by Ben Affleck, is busy preparing for a round of speed-dating. Despite his mathematical skills and unique dating algorithm, he finds himself socially awkward and leaves the women unimpressed.
Soon, Burke and his right-hand man Cobb, played by Grant Harvey, discuss Ray and Anaïs at their operation site. They are well aware of Anaïs's lethal capabilities, having witnessed her in action during a previous meeting. Burke orders Cobb to eliminate anyone who might be investigating their illegal operations.
Curious about Ray's mysterious activities, Marybeth dives into her investigation. She uncovers documents concerning Christian and learns about his connections to a neuroscience academy. Meanwhile, Justine, Chris's handler, overhears Marybeth reporting Ray's murder. During her search, Marybeth bumps into Chris in a parking lot, and together they explore Ray’s research, which includes snapshots of deceased Chilean ex-Special Forces members and a tax return form from Edith Sanchez. They eventually trace Edith's father, Emiliano Gonzalez, who was murdered in Fort Worth.
As the investigation progresses, Chris and Marybeth visit a pizza factory to gather information from a manager named Ike. When Ike is uncooperative, Chris confronts him and hints at potential money laundering activities. This leads to a physical altercation where Chris manages to extract crucial information about Tomas, portrayed by Lombardo Boyar, who is involved in a trafficking ring.
Conflicted about their family dynamics, Chris's brother Braxton, played by Jon Bernthal, is caught up in his attempts to adopt a Corgi while being drawn back to his brother's side due to a call for assistance. Their reunion takes a darker turn when they scheme to extract information from women connected to Tomas. They succeed in capturing him, but not before uncovering the gruesome truth behind Emiliano and Edith’s tragic fates.
Marybeth soon learns of the increasing danger surrounding Kelly, as she comes face-to-face with the impending threat posed by Burke and his mercenaries. In a tense sequence, she and Chris get deeper into the criminal underworld, using dubious methods to uncover the whereabouts of the kidnapped children, including Edith's son Alberto.
In an intense climax, as Marybeth fights for her life against Anaïs, who reveals her violent past as a victim of trafficking, Chris and Brax make a daring move to rescue the children from Burke's clutches. They storm the compound in Juarez, leading to a ferocious battle where they dismantle Burke's operations and rescue the innocent victims.
After the dust settles, the children are returned home, and Chris and Brax start mending their relationship. With Marybeth on the mend, she returns to work feeling a sense of closure for Ray as justice prevails, with a lingering hope for healing and a brighter future ahead.
