Yahzee and Whitehorse, childhood friends from the Navajo tribe, are trained to send and receive coded messages that direct artillery fire. Enders and Henderson are instructed to kill their code talkers if capture is imminent so that the code cannot fall into enemy hands. As Enders and Henderson meet Yahzee and Whitehorse, it becomes apparent that the two experienced Marines are less than happy to be babysitting their Navajo codetalkers, and the Navajos must also endure racial harassment by some of the white Marines, notably Private Chick. During their missions, however, Henderson and Whitehorse discover a mutual love of music. Enders and Yahzee also discover that they have much in common, notably their Catholic upbringings.