This True Story film follows Desmond Doss (Andrew Garfield), a young American man from Virginia who holds deep convictions as a Seventh-day Adventist. Despite the United States' involvement in World War II, Doss enlists in the US Military, driven by profound patriotism, but he adamantly refuses to touch or carry any weapon due to his religious beliefs. His refusal to hold a rifle earns him ridicule, intimidation, and threats during his basic training camp.

Doss’s refusal to obey orders to carry a weapon causes significant friction with his superiors and fellow soldiers. He faces a court-martial, where the government attempts to discharge him. Through the intervention of his father (a World War I veteran), Doss wins the legal right to serve as a medic, unarmed, making him the first conscientious objector in US Military history to be awarded the Congressional Medal of Honor.

Doss's unit, including soldiers like Vito Rinnelli (Richard Pyros) and other supporting troops (such as those played by Jacob Warner and Milo Gibson), is deployed to the Pacific to participate in one of the most brutal conflicts: the Battle of Okinawa. They are tasked with securing a sheer cliff face known as Hacksaw Ridge, a truly unforgiving battlefield heavily defended by Japanese forces.

The climax of this Action Movie occurs after Doss's unit is forced to retreat from the ridge under heavy assault, leaving many soldiers severely wounded. While his comrades surrender, Doss refuses to abandon the bullet-ridden, corpse-strewn battlefield. He spends the night alone, heroically rescuing soldier after soldier, regardless of whether they were friend or foe, lowering them down the cliff face using an improvised rope system.

In an extraordinary act of War Drama and bravery, Doss successfully rescues 75 wounded men. He not only treated and saved soldiers who were near death (including his own commanding officer) but did so repeatedly, offering a prayer each time he managed to pull another man to safety. Doss's actions transform the view of his unit, who transition from hatred to profound respect.

The film concludes with the American victory and Doss’s story being recognized as that of a true War Hero. His courage, rooted in his belief against taking life, ultimately became the greatest force that saved dozens of lives on one of the war's deadliest fields. His story becomes a legend of civil courage and faith in the face of extreme violence.