After the fall of Tobruk in June 1942, U.S. Army sergeant Joe Gunn direct his tank to the Sahara desert, to be able to prevent advancing Rommel's forces and also hit Allied lines. On the way he picks up Allied soldiers, but soon they're currently running out of water. They find water however the well can be really actually a objective of an entire German battalion. Inspite of the chances that are impossible, Sergeant Gunn decides to defend the well.