Vinh Linh is a district of Quang Tri province in Vietnam. During the Vietnam War, the United States released a large number of bombs on this land, destroyed many villages and killed thousands of innocent people. At the time the Vinh Linh people built an extraordinary system of underground tunnels. Fifty years later, young people want to experience the underground life in the historic underground system. This documentary follows them and answers the question on how the army and the people of Vinh Linh could survive this fierce war. The young people have to dig their own tunnels, to live, eat and sleep underground like in the wartime. The old Vinh Linh people, who have actually survived the war, are the witnesses who watch the young people’s experience. Through the contrasting views between two generations, the story of the lives in the historic Vinh Linh underground tunnels is revealed: a tearful, heroic legend we could never imagine. ‘I have never seen such a film like this before, it is a revolutionary way to make a documentary.’