In the 21st century, a global socialist security organization is concerned over a new energy source, of possible alien origin, falling into the hands of one of the last remaining capitalist countries and turned into a super-weapon.

Germany in 1943. The Berlin worker Klaus Hartung is deployed as a soldier to the Eastern front during World War II. During a tour, he is captured by a Russian patrol. While in captivity, Hartung comes to the conclusion that he has to come through and actively take part in the effort to end the war. He consents to abduct a German officer together with two Russian soldiers. During their adventurous mission, the men who at first had been enemies, become sincere friends.