During the height of the Vietnam War, something crashed at Dak To. Everyone wanted it, everyone was willing to kill for it, but nobody knew what it really was. Enter Captain Jay Swift, the head of an elite foreign technologies reaction team who is sent to the war zone in the Republic of South Vietnam. He, along with his trusted colleague, Fred Mason, will embark on a mission to recover anything of value that would give the United States a technological advantage over its adversaries.

But upon arrival in Saigon, they quickly discover the truth is both elusive and unbelievable as the cover story they are pressured to sign off on. All the while, they are shadowed by a ruthless group of operatives known as the Men in Black who traverse the countryside in modified black UH-1 helicopters leaving a string of dead bodies of anyone connected to the case.

With time running out and three North Vietnamese Divisions closing in on the crash site, Swift must pick up the trail of the 4th Infantry Division and avoid both American and enemy forces in the field. With the help of a Navajo Engineer, Swift must penetrate an enemy tunnel complex and solve the mystery which could significantly alter the course of mankind. And do so, before the Men in Black wipes out any trace of his existence!