Julia's life is wonderful. She lives in the United States, goes to a great school, sings, and runs a popular online channel. Just an "American dream". One day, when her parents decide to return to Poland, everything will change. Julia will have to find herself in a new school - Millennium High School, ruled by "teams": athletes, nerds, vloggers, musicians, fans of a beautiful look, and VIPs, led by the self-righteous Victoria. Together with Magenta, the school's outsider, and Kuba, the unfulfilled musician, they will create a group of the excluded. An annual music competition will be held at school soon, in which the winners will be a scholarship and a trip to the United States. Julia cannot miss this opportunity.

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.