The film tells the love story of two young couples. According to their social ranks, construction worker Edy is dating employee Siegi, while medical student Dieter is dating art school student Sonja. Rather unintentionally, they exchange partners. During a carnival ball, Dieter makes out with Siegi because he falls for her her fresh and happy girlish manner. Sonja coolly observes this game and sees this intermezzo as a test for their relationship. While Siegi and Dieter vacation at the sea, Sonja falls in love with Edy. Now the die seems to be cast for new constellations. But when both couples stand in front of the registrar’s office, they finally come to their senses.

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.

Based upon Shakespeare′s "Twelfth Night", the movie tells the story of the Duke of Illyria who is in love with the Countess Olivia. Olivia, however, keeps eluding him. When the Duke sends her a page to bring her a message, Olivia falls in love with the messenger who is in fact a woman called Viola. After she was shipwrecked on the shores of Illyria, Viola assumed the role of her missing brother. She cannot return Olivia′s love because she, in turn, adores the Duke.

The adventures of Kit Bellew and his friend Shorty during the gold fever at the end of the 19th century.

Hannes comes forward with a suggestion on how to make his brigade more efficient. Due to his success, he and all of his colleagues are granted a special leave. They decide to spend their free time in a holiday home. Hannes, however, does not join them. Instead, he pretends that he has to help his wife Irma with the installation of a machine for the agricultural cooperative. While Irma thinks that he spends his holiday with the brigade, Hannes goes on a road trip with the young and pretty Monika who has no idea that he is married.

Stasi agent Alexander Berg has to uncover a plot of sabotage.

Leading chemist Hans Schramm is betrothed to Hanna, but falls in love with her younger sister Franka. The two attempt to repress their feelings, but eventually begin an affair. When Hans is extorted by a group of West German agents, who demand to know about his secret work, he is gripped by panic and decides the only way out is to flee to the West …

A Saturday evening dance in the village pub is interrupted when the barn of local farmer Paul Gäbler catches on fire. The farmer himself is soon found – hanged. Sawmill owner Züllich claims that Gäbler committed suicide because he was forced to join an agricultural production cooperative, but others are convinced Gäbler was murdered. Officers Schneider and Anders must navigate their way through a complex maze of personal and political motivations in order to reconstruct the crime.