[1] It tells the story of Bert Ljung from 5 June to 23 August during the calendar year he turns 15 during the summer break between the 8th and 9th grade at school in Sweden.

Bert's family's neighbour soon learn how calm it has been without the Heman Hunters in the basement, and when practicing begins again, the band is kicked out.

Bert soon falls in love with Karolina Katarina Possén, who comes from a wealthy family and attends the school "Butter Palms skola".

Bert takes a summer job at a cracker factory, while Åke sells coconut balls down a country road.

They escape a police car (none of them wears a helmet, and Dödgrävarn uses engine tuning), and Bert gets wounded and ends up at hospital, but is soon let home.