Dan Frazier is a U. S. Border Patrolman on the California-Mexico border whose hot temper and ready-fists keep him in trouble, both of which indirectly lead to the death of a fellow trooper. He resigns from the force in order to find out who was responsible. He believes it was a gang of smugglers, engaged in smuggling illegal aliens into the United States from Mexico, and in order to get inside the gang he fakes smuggling activities.

A magazine reporter exposes a crooked District Attorney, resulting in his trial. Complications ensue, however, when the man is acquitted.

During the Korean War Lt. Sam Pryor volunteers his platoon to escort Greek troops to perform a reconnaissance mission behind Communist lines. Due to his Greek heritage Pryor is initially proud to accompany the Greek contingent but his feelings change to scorn and mistrust when what he believes is cowardice shown by the Greek soldiers and their leaders results in the near annihiliation of his own platoon. An uneasy alliance is maintained between the US and Greek troops as the enemy's true objective is learned.