As World War II intensified, US Marine Corporal Joe Enders (Nicolas Cage) emerged from the harrowing aftermath of the Solomon Islands, where he had tragically lost his entire squad in a fierce battle against the Imperial Japanese Army. The emotional scars left by the loss of his comrades deeply affected Enders, compelling him to return to the front lines with a grave sense of purpose. Joined by Sgt. Pete “Ox” Henderson, Enders was assigned the crucial task of protecting two Navajo code talkers, Pvt. Ben Yahzee and Pvt. Charlie Whitehorse (Adam Beach), who had been trained to send encoded messages that directed artillery operations.

The Marines faced a stark directive: should the Navajo soldiers be captured, they were to be eliminated at all costs to maintain the secrecy of the invaluable codes. This daunting mission created tension between Enders and Henderson, who initially viewed their charges with skepticism. However, their shared backgrounds in music and Catholic faith began to forge a bond amidst the simmering racial tensions between white Marines and their Navajo counterparts.

The brutal invasion of Saipan in the Mariana Islands marked the first combat experience for Yahzee and Whitehorse. Following their successful beach assault, chaos erupted when the Marines came under friendly fire from U.S. artillery. In a moment of desperation, Yahzee proposed a bold plan to disguise himself as a Japanese soldier to infiltrate enemy lines and seize a radio for communication, with Enders to act as his captive. Before undertaking this perilous mission, Yahzee grappled with the moral weight of taking a life for the first time. His courageous act ultimately earned Enders a Silver Star, though Yahzee’s pivotal role was often overshadowed until Enders brought it to light.

That night, while stationed at the village of Tanapag, Yahzee received a temporary assignment to decode a message, which heightened the weight of his responsibilities. Enders felt the pressure of his dual obligations: to protect Yahzee while also adhering to his orders. When he requested to be relieved from duty, his plea was denied. The next day, tragedy struck as Japanese soldiers launched an ambush on the village. In the chaos, Henderson was killed, and Whitehorse barely escaped capture. In a desperate effort to keep the code from falling into enemy hands, Enders hurled a grenade at Whitehorse’s captors, resulting in the deaths of both Whitehorse and his aggressors. Yahzee returned to Tanapag only to confront the heartrending sight of Whitehorse’s lifeless body. Consumed by fury, Yahzee nearly killed Enders in retribution but ultimately could not carry out the fatal act. In the aftermath, Enders expressed his sorrow about Whitehorse’s death, admitting that the protection of the code had always been his foremost concern, even over human life.

As the Marines braced for another intense ambush near the perilous minefield of Mount Tapochau, the grim realities of warfare became painfully clear. The once-strong unit had dwindled to a desperate few: Enders, Yahzee, Pvt. Chick, and Cpl. Pappas. Their position on the ridge offered a stark panorama of destruction, watching as Japanese artillery mercilessly targeted a Marine convoy, claiming more of their comrades. Yahzee’s anger over Whitehorse’s demise fueled his resolve, and when an opportunity presented itself, he charged headlong into the fray, dispatching several enemy soldiers, but not without grave consequences—a bullet struck both him and Enders as they called for an airstrike to devastate enemy positions.

With the tide of battle turning in their favor, Yahzee found himself cornered, facing the horrifying possibility of capture and torture. In a poignant moment, he begged Enders to spare him the suffering, fully aware that the precious code would never be allowed to fall into enemy hands. Driven by an unwavering commitment to preserve Yahzee’s life on this blood-soaked day, Enders managed to rescue him but suffered a severe mortal wound in the process. As friendly aircraft arrived to decimate the Japanese stronghold, Yahzee reveled in the victory, yet he would forever carry the burden of Enders’ sacrifice in his heart.

Back in the United States, Yahzee and his family gathered in Monument Valley’s Point Mesa, Arizona, to honor Enders’ memory. The solemn Navajo ritual underscored the profound connection forged between these warriors from disparate worlds. In a moving conclusion, an epilogue reveals that the Navajo code played a critical role in America’s success in the Pacific Theater, its secrets safeguarded like those of other Native American codes that remained unbroken throughout the conflict.