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.

The "Concordia" trading company in Würzburg is a secret headquarters of the MID, a secret service agency of the US Army. For years, espionage, sabotage, and diversion operations originated from here in order to undermine the Socialist Republic of Germany. A favorable moment for a military attack approaches and plans are developed. These plans are placed in the hands of Major Collins, who keeps them in a safe. Hansen has worked for him for many years, but also for the Stasi as a double agent. Security Chief Colonel Rock knows there is a leak, but Hansen has passed every test thrown at him. He is trying to deal with his current assignment: acquiring the plans so they can be made public. His mission is to get them out of the safe and into the GDR without getting caught.

In the middle of the next century, a spaceship loses its bearings, and the commander of another space crew, seemingly on a routine check flight, decides to investigate. The result is an unusual suspense adventure.

Maria, a young student sees her brother Dieter going to prison for sedition against the state. She starts an affair with Paul, a judge who turns out to be the one who sentenced her brother, which eventually leads to a confrontation.