Yugoslavia in 1941 was in a period of German fascist occupation. One night, Marko invited a small band to join the party to celebrate his friend Petar's joining the Communist Party. He and Petar both drank brandy, drove through the empty streets in a carriage, and even fired shots and cheered. Petar is robbed home by his nagging wife, and Marko goes to find a prostitute and fool around. Marko’s brother Ivan is a zoo keeper. He is always involved with animals because of stuttering.
Wu, but in a bombing by the German army, the zoo was destroyed. He only rescued the chimpanzee Song Ni. Petar's wife is about to give birth, but he is fascinated by the young and beautiful drama actor Natalie, and is very angry with her Nazi officer lover Frans. Petar rushed to the theater stage and hijacked Natalie from the show, but was soon caught by the German army and tortured. Marko disguised himself as a doctor and mixed into the German army's den, strangled Frans, and rescued Petar. The German Nazis launched a large-scale raid. A large number of revolutionary family members including Ivan took refuge in the cellar of Marko's home. Petar, who was seriously injured, was also sent in. Marko became their only contact with the ground. Petar's wife died in childbirth, leaving behind her son Zufan. But at this time Natalie fell into Marko's sweet words.
Four years later, the invaders were driven away, Yugoslavia established its own republic under Tito's leadership. Marko was in a high position as his comrade-in-arms and was worshipped by the masses along with his wife Natalie. He used various methods to convince Petar and others in the cellar that the war was still going on, and they had to hide inside to make weapons for the "revolution", but he never dreamed that these weapons would be shipped abroad in batches from the backyard in exchange for Marko. Banknotes. Time flies by, Marko and Natalie come to the Underground to attend the wedding of Petar's only son, Zufan. At the grand celebration, people feasted and drank, but three old friends for many years had their own thoughts. The chimpanzee Song Ni fired the cannon by mistake, and the banquet was immediately chaotic. Petar took the opportunity to sneak to the ground with Zufan's gun, preparing to fight the German army. They took the movie location as the enemy's position and started to kill, but Zu Fan fell into the water early the next morning. In order to find Song Ni who was frightened and fleeing, Ivan also came to the ground, but was taken to West Germany by passing vehicles. Marko and Natalie blew up the cellar and fled the country with the money earned from smuggling arms.
It was 1995. Ivan, who had been in a German mental hospital for several years, accidentally saw the news that Marko and Natalie were wanted in the newspaper before he realized that his brother had deceived him, so he walked back to his hometown along the Underground tunnel, but this time Yugoslavia has fallen apart, wars are raging, and Petar has become the leader of the war. Marko, who was in a wheelchair, was still in the arms business. An angry Ivan killed him. He then hanged himself in the church. Natalie, who accompanied Marko, was shot and killed by soldiers. And the lonely Petar seemed to hear his son's call, jumped into the well, passed through there to reunite with his wife and children, and settled his suspicions with friends, and everyone lived happily together
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