In 2028, the powerful multinational conglomerate OmniCorp is at the forefront of military technology, specializing in robot soldiers to assist the US Military overseas. Despite their success, OmniCorp faces public resistance in marketing their mechanical creations for civilian law enforcement due to the Dreyfus Act. To change this narrative, CEO Raymond Sellars (Michael Keaton) collaborates with scientist Dr. Dennett Norton (Gary Oldman) and his marketing team to develop a product that merges human and machine for law enforcement.
They set out to find a severely injured officer to become the prototype for this new officer, leading them to police detective Alex Murphy (Joel Kinnaman). Alex and his partner, Jack Lewis (Michael K. Williams), try to apprehend crime boss Antoine Vallon (played by Patrick Garrow), but the operation goes awry due to leaks from corrupt officers. In a desperate act of retaliation, Alex is almost killed by a car bomb. This incident prompts Dr. Norton to select Alex for the RoboCop initiative, with the consent of his wife, Clara (Abbie Cornish). Upon undergoing the transformation, Alex is confronted with the reality of his condition, seeing only a remnant of his former self—a collection of vital organs and a cybernetic framework. With encouragement from Dr. Norton, he resolves to stay strong for his family.
However, military tactician Rick Mattox ([Jackie Earle Haley]) remains skeptical about Alex's performance, asserting that he cannot match the efficiency of a fully mechanical counterpart. Alex's humanity presents a challenge as he navigates law enforcement tasks with hesitation rooted in his human instincts. In an attempt to enhance performance, Dr. Norton manipulates Alex’s brain to make him believe he has free will when, in fact, he is following embedded programming. During a pivotal press conference, Alex's overwhelming emotions trigger a seizure, leading Norton to chemically dampen his feelings. Thus, during the event, he casts aside thoughts of Clara and their son, David ([John Paul Ruttan]), while temporarily eliminating crime in Detroit.
As the public begins to rally behind RoboCop, Clara bravely confronts her husband, revealing that David is struggling with nightmares from the traumatic incident he witnessed. Despite his programming, Alex eventually breaks through the controls and discovers his emotional connection has been restored, allowing him to realize what his family has been enduring. Fueled by vengeance, Alex sets out to confront Vallon, ultimately killing him in a confrontation at his hideout.
Upon returning to the police station, Alex takes down corrupt officers linked to Vallon's operations, but Mattox soon regains control over RoboCop, managing to shut him down. Seeing an opportunity, Sellars exploits the situation to showcase the flaws in human officers while pushing for the repeal of the Dreyfus Act, encouraged by TV host Pat Novak (Samuel L. Jackson). In a desperate move, Clara publicly demands information on Alex's condition, leading Sellars to deem him expendable and order Mattox to eliminate him.
Dr. Norton, however, manages to save Alex and reveal the deceit behind the RoboCop project. Feeling betrayed, Alex resets his sights on Sellars, who has fortified the OmniCorp building with drones. Gaining entry with the help of Lewis and other officers, Alex confronts Mattox, who attempts to activate a fail-safe protocol within Alex’s programming, preventing him from attacking those tagged as 'Red Assets.' However, Alex's determination allows him to overcome the limitations, leading to a climactic confrontation with Sellars, who holds Clara and David hostage. In a final act of defiance, Alex shoots and kills Sellars despite being marked as a Red Asset.
As the dust settles, OCP, OmniCorp's parent company, reevaluates the programs, while Alex undergoes rehabilitation and prepares to reunite with his family. Meanwhile, the President disregards the repeal of the Dreyfus Act after hearing Dr. Norton's testimony about the unethical practices in the RoboCop program. The movie ends on an explosive note as Pat Novak, angered by the unexpected turn of events, reveals his true allegiance on live television, shocking viewers and the crew alike.
