Second half of the 1970s. A few teenagers from the town of Ustrzyki Dolne, led by a charismatic and undisciplined student of the local school, Siczka, decided to become punks and get into punk rock and start a band called KSU.

Ignacy Liss
as Eugeniusz 'Siczka' Olejarczyk

Maciej Piotrowski
as Bogdan 'Bohun' Augustyn

Igor Paszczyk
as Wojciech 'Ptyś' Bodurkiewicz

Bartłomiej Deklewa
as 'Tomkas'

Piotr Głowacki
as Captain Jerzy Majak

Szymon Kukla
as Waldemar 'Burek' Kuzianik

Filip Łannik
as Bogdan 'Tuptuś' Tutak

Zuzanna Galewicz
as Iga

Wiktoria Kruszczyńska
as Iwonka Majak

Iga Szubelak
as Kasia Solecka