During the Korean War, three American prisoners of war — MSgt. Ed Brent Rory Calhoun, Sgt. Peter Kane William Bendix, and Pvt. Kirk Wilson Robert Ivers — escape from their North Korean captors and set out to reach the American lines about 40 miles (64 km) away. Early on, they are offered shelter by a Korean couple who have a young son, Han Manuel Padilla Jr.. While Han hides in the nearby hills, the pursuing captors kill the couple, leaving the three escapees to continue their trek with Han and his dog, Lobo.
As they press on, Brent, now the ranking officer, argues for taking the boy and the dog along, arguing that their presence might slow them but could also provide hope and protection. Kane, however, worries about the strain on their scant rations and tries to outvote Brent by appealing to Wilson, who claims that rank no longer matters after captivity. Wilson wavers, but the trio ultimately decides to move forward with Han and Lobo in tow.
On the journey, Estway Richard Jaeckel, a fourth escaped prisoner who has been brainwashed, joins them briefly. He carries a two-way radio recovered from a broken jeep, but its batteries are dead. They agree the radio could be useful if they could find fresh batteries, a plan that will hinge on their next encounter.
Tragedy strikes when Wilson steps on a land mine and is killed. The group mourns, and they soon discover that Lobo senses danger; the dog prevents a second mine from harming them and proves to be a valuable asset for detecting threats. With the dog’s help, they scout ahead and survive the treacherous terrain.
Food becomes scarce, so they split up to search for provisions. Han discovers a wild pig, which Kane captures and kills. As they debate how to cook it, Han shares a practical piece of wisdom: you don’t skin a pig but rather roast it whole over an open fire — a moment that underscores Han’s surprising ingenuity for a boy his age. After that meal, they remark on how sharp and perceptive Han is, especially given his age, likely around 9 or 10.
Their path leads them to a grass-thatched farmhouse. They wonder if it’s occupied, and the presence of a radio antenna suggests there could be batteries inside. Hesitant because North Korean soldiers might be indoors, they decide to send Han to scout, trusting the boy’s innocence. Han bravely volunteers, but the occupants react violently. Soldiers emerge, shoot Han in the leg, and search for the escapees. The trio ambushes two approaching soldiers, forcing Kane and Estway to don the fallen enemy uniforms and pretend Brent is under arrest. When the group closes in, they open fire and eliminate the remaining soldiers. Meanwhile, the wounded Han manages to flee.
They soon locate batteries, enabling radio contact with a nearby American base. A helicopter is dispatched to pick them up, but its capacity is limited to two men at a time. Estway volunteers to board alone to ensure one more chance to reach safety, while Brent and Kane stay behind to continue the search for Han. The helicopter returns, but Estway uses force to demand that Han be found, dropping a note that Han was spotted in the next canyon, which is about to come under heavy enemy bombardment.
Brent and Kane hurry toward the canyon and spot Han, but they are caught in a crossfire from both sides. The dog Lobo is fatally shot, and Brent sustains a knee wound, yet they manage to reach Han. They are then rescued by American infantrymen, completing the dangerous ascent back toward safety.
Back at the base camp, the trio faces disciplinary charges: disobeying orders to board the helicopter, and Estway is charged for brandishing a gun at the pilot. Kane, however, defends their actions and explains the full sequence of events to the commanding colonel. The colonel recognizes their bravery and confirms that Han is a remarkably brave seven-year-old. Kane suggests that Brent should adopt Han, as Brent would be returning to America soon due to his injuries, and this arrangement would give the boy a chance at a new life. Brent agrees, and Han prepares to leave with him for the hospital, while Kane looks on with a quiet sense of accomplishment at the bond they have formed and the peace they have helped secure for one brave child.
