"Koza" ("Skin") is the story of a musician, former drug addict and drug dealer named Slobodan Milosevic, who, after serving several years in prison for smuggling twenty kilograms of cocaine into the Netherlands, is released. On the way back via Belgrade to his hometown of Banja Luka, Slobodan's reminiscences of his previous life come to life: his time studying at the music academy in The Hague, the war in the former Yugoslavia in which his parents were killed, and the period of his life in Belgrade in the 1990s marked by characters from the criminal and drug-addicted milieu. Upon arriving in his hometown, Slobodan tries to find his place in a society and system that has long since changed and is governed by new rules that are unfamiliar to him. At the same time, he is confronted with characters and events from the past that will change him again and present him with a dilemma - should he pursue purification and a better life through revenge and the expulsion of his own justice, or through forgiveness and the healing of his soul?