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.
In an inaccessible place between the mountains and isolated from the world, a school is located next to an old monastery. The students are rebellious and problematic young people who live under the strict and severe discipline imposed by the center to reintegrate them into society. The surrounding forest is home to ancient legends, threats that are still valid and that will immerse them in terrifying adventures.