The concept mainly focuses on the theme of Onoda's isolation from the rest of the world and the effects on the way he lives after his disappearance and discovery.

When the time had finally arrived, Nude finds himself alongside other young soldiers who are being loaded onto a ship to head for battle with a crowd of people watching behind them ("Docks").

Eventually, he is thrown into the fighting on a Pacific Island and is quickly overwhelmed by his surroundings, leading to a blackout during combat ("Beached").

By now, Nude has given up his search and is currently living in a cave beside a lagoon, constantly patrolling through the jungles for any hiding enemies ("Changing Places").

Every once in a while, he retreats to a high mountaintop and runs through a procedure that fulfills his military duties, including reciting his countries national anthem and firing a bullet into the sky ("Pomp & Circumstance").

When a plane flies over him one day, Nude is greeted by a large content of leaflets, letters and photographs urging him to accept the end of the war and for him to return to his country ("Please Come Home"), however, he dismisses these replies, assuming that the Allied Forces were playing tricks on him.

Despite the warm welcome, his years of loneliness and lack of communication leads to a breakdown; a tidal wave of publicity that he did not favor ("Lies").

In 2008, Steven Wilson, writing in Classic Rock magazine, included Nude as one of "10 Mind-Blowing Concept Albums that may have slipped under your radar".