It's 1968, near the peak of the Vietnam War, your squad that your apart of is ambushed on patrol near an river.

everyone but you is killed in action, or taken prisoner, the reason why is you fell into the river after being shot, your swept down the river, your now MIA.

when you awake, you find yourself on the bank of the river downstream... nearby an village, in an very remote area, near the Laos border. It's really your only hope right now... you don't even know where you are... at all.