In 1942, several hundred Navajos were recruited as Marines and trained to use their language as code. Marine Joe Enders is assigned to protect Ben Yahzee - a Navajo code talker. Enders' orders are to protect his code talker, but if Yahzee should fall into enemy hands, he's to "protect the code at all costs." Against the backdrop of the horrific Battle of Saipan, when capture is imminent, Enders is forced to make a decision: if he can't protect Yahzee, could he kill him to protect the code?