This is part one of a two-part biopic about Karl Liebknecht. In 1914, Germany is arming itself for war. Karl Liebknecht, left-wing revolutionary Social Democrat, workers’ leader and a virulent antimilitarist, is one among 110 SPD members of Parliament who vote against approving war loans. From then on, he is considered un-German and a traitor to the fatherland, and his own party’s leadership turns against him. Despite threats, Liebknecht speaks up against the war and writes the manifesto “The Main Enemy Is at Home.” Even when he is arrested and charged with treason, he does not surrender.

In 1955, Michael Vierkant, a Jew who had emigrated during the Nazi era, returns from abroad to the Federal Republic of Germany to obtain the conviction of Korn, the former informer responsible for the murder of his sister. Korn is back in office; Michael's efforts remain unsuccessful. There is a direct confrontation between the two, and Michael shoots Korn in self-defense. He flees and is hidden by the young, reclusive artist Marie Jäger, but is then caught by the police and charged with premeditated murder. The case is taken out of the hands of the criminal investigation department by the Office for the Protection of the Constitution, which constructs an act of political revenge on behalf of the communists. Michael manages to escape from prison. Marie and her friends organize a press conference at which Michael reveals the connections. The trial is postponed.

Magdalena and Michael have loved each other since they were children. But when the Nazis come to power, Michael rebels against the regime and is sentenced to fifteen years in a concentration camp. Magdalena, meanwhile, goes underground with the help of a friend and later immigrates to the Soviet Union. Michael, who has joined the Red Army, discovers on the way to Moscow that Magdalena is staying there. But when his plane lands, she is already on her way back to Germany. Michael hopes that one day, he and Magdalena will be reunited.

Young Kuttel belongs to a group of working-class children who live in Berlin at the beginning of the 1930s. In the big summer holidays in 1931, the children want to make a race with their model boats and choose as a venue for the small artificial water in the park of their neighborhood. All children in the area are invited to participate in the competition. But there is a traitor among them, who tells the company to the local police officers, who in any case look with arrogance on the "Reds"...

In the late 1950s, the collectivization of agriculture is in full swing in the East German village of Willshagen on the German-German border. Those in charge have to face many obstacles, especially from a large-scale farmer who is unwilling to join the co-op. All of a sudden, mysterious men in a fancy car appear in the village and show an interest in the rundown manor house. Gossip spreads quickly, and some villagers think there will be a re-parceling of properties and a land swap with West Germany. They assume everything will go back to how it used to be and even expect the count to return to his manor. In preparation, the situation in the village escalates at a fevered pitch.

Railway employee Fritz Marr is not regarded well by his superiors. It is the year 1920, and trains regularly pass the railway hub of Erfurt to the East to secretly transport weapons for the fight against the young Soviet Union. Marr knows about this and wants to mobilise other workers to stop these illegal deliveries. To muzzle him, Marr is relocated to a remote rail work construction site.

Albert Hauptmann is an out of work waiter in Cologne who is often confused with a former Captain of the Nazi Army. Albert uses this to his advantage and becomes the Director of the Montan Corporation, and a member of the West German Parliament. Herr Karjanke, the real Captain, learns of Albert’s ruse, and wants to claim his "rightful" position in Parliament. But Karjanke cannot come forward until his politicking "Doppelganger" succeeds in passing an amnesty law for war criminals. When Albert is finally brought before a judge on charges of fraud, he learns that this own amnesty law does not apply to him.

A film about the historical uprising of the seamen in Kiel: During the Russian October Revolution of 1917, German and Russian soldiers start to solidarize with each other. By disarming the officers, machinist Henne Lonke and stoker Jens Kasten prevent the attack on a Russian freighter. When German admiralty gives out orders for operation "Nibelungen", which would lead the German fleet into a suicidal attack against England and quell the revolutionary spirit, seamen and soldiers from different political backgrounds unite in protest.

In spring 1957 Budapest, former lovers Sándor and Mónika reunite after 16 years at a street‐corner café. Their conversation flashes back to 1941, when Hungary joined WWII under Horthy and eight fresh teacher‐graduates, including Sándor and Mónika, vowed lifelong solidarity. War and shifting politics fracture their bond and force each to choose a path through turbulent decades. The drama echoes the 1956 uprising: participants seeking reform are branded “counter‐revolutionaries,” denounced by steadfast communists like László, who scorns defectors such as Béla for “dishonouring socialism and the people.”

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.