WHEN I GROW UP I'LL BE KANGAROO comprises three intertwined stories set in the Belgrade suburb of Vozdovac. In the first, Vozdovac native Braca tries to pick up Iris, a model from the city center. Although they try not to be from two worlds, they are. In the second story, Somi and Duje bet on the London football club Eastwich, where their school friend ("Kangaroo") is the goalkeeper, against Manchester United. In the third story, Avaks and Hibrid spend their day killing time on the roof of their apartment building waiting for something to happen. Their philosophy is "I make the most profit when I sit at home: no income but no expenses". And then Avaks sees something strange happen in the sky.

This is a story about young people at the point when their youth runs out, but they haven't achieved anything in their lives. They're occupied with peripheral matters and even when they try to make changes in their lives they do it the wrong way. They are waiting for something to wrest them out of their torpor, without realizing that life and spiritual well-being are not things that come as a gift but are something which must be worked at.