In South Vietnam, 1969, a unit of the 3rd Battalion of the 101st Airborne prepares to head into combat once again, welcoming five new recruits known as FNGs (new guys). Among them are Private Beletsky (Tim Quill), who worries he won't remember his training, Private Languilli (Anthony Barrile), who is frustrated by the mispronunciation of his name, and Private Washburn (Don Cheadle), along with Private Beinstock and Private Galvan (Michael A. Nickles), the most reserved yet promising newcomer. They are mentored by their weary squad leader, Sgt. Adam Frantz (Dylan McDermott), who guides them through an intense crash course encompassing essential battlefield skills, from maintaining oral hygiene to showcasing the vulnerabilities of their defenses through a demonstration by a captured NVA soldier.
The unit also contends with a new commander, Lieutenant Eden, who needs the expertise and fortitude of both Sgt. Frantz and platoon-Sgt. Worcester. The platoon's machine-gun team consists of the robust Private Duffy (Harry O'Reilly) and his mismatched friend Private Gaigan (Daniel O'Shea). The trio of African-American veterans—Private Motown (Michael Boatman), Medical Specialist 'Doc' Johnson, and Sergeant McDaniel (Don James)—each grapple with the ongoing racial discrimination within the military.
Their initiation into war arrives suddenly when tranquility by the river is shattered by an enemy artillery barrage, leading to the tragic death of Galvan. As the days progress, the platoon ventures into the A Shau Valley on May 10, 1969, where they encounter an enemy patrol, igniting a fierce firefight that costs Sgt. McDaniel his life. This event stirs emotions, particularly heightened by the fact that McDaniel was close to the end of his tour and, due to his race, was denied opportunities for rear-line assignments.
The platoon then embarks on a relentless assault against the enemy-held Hill 937, confronting unexpectedly fierce resistance from well-prepared NVA forces. As they face repeated assaults with devastating air strikes rendering the once vibrant hill into a desolate wasteland, they are met with tragedy when Duffy, in a desperate charge wielding an M-60, suffers from a misdirected airstrike that leads to many casualties, including himself.
Amidst the chaos, the dwindling platoon manages to find brief moments of respite, sharing their feelings about the cultural upheavals unfolding back home. Beinstock is crushed by a Dear John letter from his girlfriend, while Beletsky receives an unexpectedly touching tape from his girl, which mentions Frantz's name, moving him deeply. Frantz expresses his disdain for draft-dodgers over a confrontation with a TV reporter, emphasizing his respect for the NVA's commitment even amidst the conflict. Worcester shares the alienation he feels from anti-war sentiments back home and reflects on the relationships fractured by war.
Determined to take the hill, the weary soldiers press on through torrential rains, where tragedy strikes again as Gaigan falls and Doc Johnson is injured. Before he is evacuated, Doc implores Frantz and Worcester to seize the hill, leaving them with a sense of pride to strive for.
On May 20, the survivors rally for their final, eleventh assault, fueled by a mix of bitterness, exhaustion, and a longing for pride in their unit. Although the last enemy positions are overrun, the battle exacts a heartbreaking toll. Lieutenant Eden loses an arm, and Worcester, Motown, Beinstock, and Languilli are lost before only three—Sgt. Frantz, Beletsky, and Washburn—remain atop the hill, weary and wounded as silence envelops the battlefield at last.
