This is one of the two starting scenarios you can play when you first purchase the game.
"How long has this siege lasted? It's hard to say when every day is a struggle for survival. The city is crawling with snipers. Shelling is ordinary business almost every night. Phones don't work, there is a shortage of food and meds, and many people are left homeless.
Bruno and Marko have always been good friends, so when the war broke out they decided to stick together. They met Pavle while scavenging for supplies. He used to be Pogoren's star football player, and now he's just another homeless victim of war, so they teamed up, hoping for the best."