In a dystopian future, Detroit, Michigan teeters on the brink of disintegration due to rampant crime and financial despair. The powerful corporation Omni Consumer Products (OCP) steps in, securing a deal to take over the police force and destroy the deteriorating section they term "Old Detroit," all in the quest to create an ideal city named "Delta City." Recognizing the inadequacy of human officers to contain the escalating violence, OCP initiates various experiments for robotic law enforcement alternatives.
One such project, the ED-209 enforcement droid, spearheaded by senior president Dick Jones (portrayed by Ronny Cox), tragically malfunctions during a demonstration, resulting in the death of a junior executive. In light of this incident, the OCP Chairman (played by Dan O'Herlihy) decides to pivot towards a cyborg initiative, led by the ambitious middle-ranking executive Bob Morton (played by Miguel Ferrer), who proposes the concept of "RoboCop."
The story follows veteran police officer Alex Murphy (played by Peter Weller), who is reassigned to a precinct in Old Detroit. He is paired with Officer Anne Lewis (played by Nancy Allen) for their first patrol. Their efforts lead them to confront a gang led by crime lord Clarence Boddicker (Kurtwood Smith) in an abandoned steel mill. In a tragic turn of events, Lewis is knocked unconscious, and Murphy is gruesomely murdered by Boddicker's crew. Although pronounced dead, OCP utilizes Murphy’s body to construct the groundbreaking RoboCop.
As RoboCop steps into action, he successfully addresses much of the city's violent crime single-handedly. However, this raises concerns within the remaining police workforce regarding their future. Unbeknownst to his creators, RoboCop possesses fragmented memories from his life as Murphy, which include fleeting images of his wife and son, along with a signature gun-spinning trick he used to perform for his child. Recognizing these habits, Lewis attempts to uncover the mystery behind RoboCop's behavior, but he remains tight-lipped.
RoboCop's effectiveness propels Morton to a Vice President position, igniting envy in Jones who orchestrates Morton's demise via Boddicker. This leads to a series of confrontations where RoboCop, discovering Boddicker in his drug hideout, learns about the criminal’s alliance with Jones. In a gripping showdown, RoboCop tries to bring Jones to justice, but his fourth directive, which forbids harming any senior OCP executives, activates unexpectedly, rendering him defenseless.
After a fierce battle with the ED-209, RoboCop narrowly escapes and faces a hail of gunfire from a police SWAT team awaiting orders to destroy him—orders that were miraculously thwarted by the cunning Lewis. Amidst increasing lawlessness and a police strike causing turmoil in the city, Jones engineers Boddicker's release from custody along with supplying him advanced weapons designed to penetrate RoboCop’s armor.
In the steel mill where RoboCop is recuperating, he and Lewis unite to confront Boddicker's crew, resulting in an intense showdown that leaves them victorious but not without injury. As Lewis battles for her life, RoboCop confronts OCP headquarters with incontrovertible proof of Jones's involvement in Morton’s murder. In a tense standoff, Jones attempts to hold the Chairman hostage, only for the latter to dismiss Jones, allowing RoboCop to take decisive action.
In the end, after Jones meets a fatal end from the height of the building, the Chairman expresses gratitude towards RoboCop for his bravery and resilience and asks for his name. In a poignant moment, he responds simply, "Murphy."
