John Rambo, portrayed by Sylvester Stallone, is a former elite member of the United States Army Special Forces, who earned the Medal of Honor for his valor during the Vietnam War. Set in the American Northwest during December 1982, a decade after the conflict, the narrative unfolds as Rambo seeks to reconnect with his old comrade, Delmare Berry, traveling to his farm only to discover through Delmare's mother that he has succumbed to cancer months prior, a suffering caused by Agent Orange exposure. Unbeknownst to the audience, Rambo realizes he is the last surviving member of his unit.
The story takes a turn when Rambo enters the small town of Hope, Washington (actual filming took place in Hope, British Columbia), where his disheveled appearance, featuring long hair and a military coat, catches the eye of the town's overly vigilant sheriff, Will Teasle, played by Brian Dennehy. With little patience for "drifters," Teasle swiftly expels Rambo from the area, only for Rambo to return, leading to his arrest. Inside the station, tensions mount as Rambo is subjected to unreasonable brutality from Art Galt, the sheriff's harsh head deputy. Haunted by flashbacks of his imprisonment during the war, Rambo reaches a breaking point when Galt and two officers attempt to dry-shave him, triggering traumatic memories of torture in a North Vietnamese P.O.W. camp. In a moment of fervent self-defense, Rambo employs his military skills to escape, overpowering the officers and commandeering a motorcycle, initiating a frantic chase into the nearby mountains.
As the desperate situation escalates, the deputies are compelled to search for Rambo on foot. Rambo, strategically maneuvering through the terrain, descends a perilous cliff to evade capture. After being spotted by Galt from a helicopter, the situation takes a deadly turn when Galt disregards safety protocols in an attempt to shoot Rambo, leading to his untimely fall from the helicopter after being struck by a rock Rambo flung in defense. Teasle, unaware of the circumstances surrounding Galt's demise, vows revenge, setting the stage for a harrowing cat-and-mouse encounter in the woods.
Teasle rounds up his deputies, who are overwhelmed by the realization of Rambo's formidable combat prowess and reputation as a war hero. Utilizing guerrilla warfare tactics, Rambo swiftly incapacitates the disorganized group, wounding several but sparing their lives. In a tense confrontation, Rambo warns Teasle, "Don't push it or I'll give you a war you won't believe. Let it go." before vanishing into the forest.
As tensions rise and a base camp is established, United States Special Forces Colonel Sam Trautman, played by Richard Crenna, arrives on the scene, apprehensive about the situation. He expresses surprise at any deputies still being alive and advises Teasle to allow Rambo to escape and regroup later. However, Teasle, fueled by pride and arrogance, dismisses Trautman's counsel. When Trautman manages to communicate with Rambo over a stolen CB radio, he implores him to surrender, but Rambo, embittered by his mistreatment, retorts, "They drew first blood, Sir." He hastily switches off the radio, deepening the conflict.
Eventually, Rambo finds himself cornered by the National Guard at a mine, where a rookie guard unit inadvertently traps him inside with a missile strike. Assuming he's perished, they leave, unaware that Rambo is cunningly navigating the mine's tunnels, ultimately crafting an improvised torch to find his way out. Ingeniously using the flame to detect air currents, he escapes to the surface.
In a shocking turn of events, Rambo hijacks a military cargo truck, careening back into town and igniting chaos by crashing it into a gas station. Lighting the fuel spill on fire to obstruct pursuit, he unleashes mayhem, armed with a powerful M-60 machine gun. As townsfolk flee in terror, Rambo methodically dismantles the police station, instigating a confrontation with Teasle. Using the skylights to his advantage, Rambo strategically draws the sheriff's fire before returning it, injuring Teasle in the process.
Just as vengeance appears imminent, Trautman intervenes, urging Rambo to cease his violent path, emphasizing the futility of his situation. Expressing his profound frustration over the horrors of war and societal rejection, Rambo recounts a haunting story of loss that drives him to tears. Ultimately, Rambo opts for surrender, relinquishing himself to Trautman as the narrative concludes with their exit from the station, encapsulating the harrowing struggles faced by veterans reintegrating into civilian life.
