It is the year 1936 and the Spanish Civil War is raging. When the German commander of an international brigade is badly wounded he gives his five comrades a message which he divides up and secretes into in five cartridges. All five shells must reach the battalion in order for the message to be relayed. But Frenchman Pierre can’t bear the heat of the Sierra. When he leaves their hide-out to drink from a well he is hit by an enemy bullet.

During the unloading of the freighter "Florida", West German dock workers discover napalm bombs instead of the specified precision machines - and a deceptive maneuver by the American occupying forces: the workers had already refused to unload the ship in France, where it was named "Chicago". It was refloated on the voyage to Germany. The German dockers also went on strike. Among them was Hein Jensen, who found it particularly difficult to take part. He had just found work again with difficulty. He needs the money because he wants to get married. His bride Helga has just given birth. When the Americans try to blackmail him into changing his colleagues' minds, he knows where his place is. The strike turns into a huge peace demonstration.

Dr. Wagner is a scientist currently working on an experiment for the Asta plant in East Berlin. If the experiment is successful its a brilliant new invention. But Wagner is the target of sabotage, and all the decisive experiment fails. Wagner can not explain this setback.

This film is the first of a two-part historical and biographical portrait of the communist politician and anti-fascist Ernst Thälmann. In early November 1918, Ernst Thälmann is an unwilling soldier serving on the western front. As the revolutionary movement at home is threatened by the betrayal of the Social Democrats and fissures in the working class, Thälmann calls on his fellow soldiers to put down their weapons and unite with the workers in the communist struggle at home. Thälmann’s qualms about which side he is fighting on continue, but when the local police attempt to prevent a shipment of provisions and supplies from reaching the people in Petrograd, he intervenes and the ship is unloaded. With this moment of clarity, Thälmann continues to follow his political convictions and joins the workers at the Hamburg uprising in October 1923.

Spain 1936: Despite the victory of the Popular Front, nothing has changed for the peasants; the grandees continue to oppress them. The poor peasant son Pablo fights back and encourages the others to demand their rights. The grandees flee. Students from Madrid arrive and help the rural population to democratize. Pablo falls in love with Magdalena and learns to read and write from her. When Franco begins his bloody attack on the young republic, they defend the village together. When Magdalena dies in a bombing raid by German planes, Pablo begins to hate the Germans. However, fighting together with the International Brigades, he realizes that there are other Germans too, and that they share a common enemy.

Antwerp at the end of the 16th century. For the second time, the city falls into the hands of the plundering and murdering Spaniards. Jan and Myga are just ten years old. While Myga's father tries to come to terms with the Spaniards, Jan leaves the occupied country with his father. When Jan has grown into a young man, he joins the Geusen and is entrusted with the best ship as helmsman, the "Black Galley". He survives numerous battles and dangers, but one day he is captured by the Spanish. He frees not only himself but also his beloved Myga from the hands of the enemy. In 1609, the Spaniards are forced to finally recognize the independence of the northern provinces.