Cardboard City follows the lives of two young teens -- members of a Romani family. Saida and Nikola experience harsh discrimination at school and crushing poverty in their improvised settlement, spread out under a bridge in Belgrade. Their dreams of escape and of leaving deplorable conditions behind trigger a family crisis. In particular, Nikola is a gifted trumpeter and aspires to be a famous musician, but it proves challenging to surmount the enormous barriers between his present situation and the self-mastery and life of dignity he seeks.