Underground plot
"ONCE UPON A TIME THERE WAS A COUNTRY"
Underground is about the two sympathetic best friends Marko and Blacky. Marko is calculating and unscrupulous, Blacky a soft-hearted idealist. They both fall in love with an actress of loose morals. After a bombing raid on their city of Belgrade in 1941, the friends go into hiding together with a lot of family friends and a monkey. After being in hiding for a while, Marko explores the outside world and tells his friends that the war is still raging. For 15 years, Blacky believes his friend's story, but then sets out to investigate himself.