It is late January 1968 when the first three incoming rounds hit Con Thien. It is undeniably the most terrifying event the rookie US Army soldiers have ever endured. Their doggie platoon sergeant, Walter Walling, who does not tolerate disrespect up or down, does his best to calm his troops. But with a North Vietnamese Army who likes laying in a few rounds and forcing the enemy to run, his job serving on the DMZ is a challenging one. As Sergeant Walling and his men, all from varying backgrounds and parts of the United States, do their best to learn an unfamiliar terrain and prepare for battle, the young American fighting men must bravely face the possibility of death while serving their country. But as a fight for power soon reveals the horrors of war in all its glory, one thing becomes certain: none of the men will return home the same as they were before. In this military story based on true events, a group of American soldiers find themselves at the end of a divided line between North and South Vietnam during 1968 and 1969.