[2] It tells the story of Bert Ljung during the calendar year he turns 15 during the autumn term in the 9th grade at school in Sweden.

The book depicts a short-haired Bert, wearing a red sweater, sitting on a stool at Christmastime looking into the mirror.

Next to a Christmas tree, with its roots placed in a jar, and on the floor is a broken gingerbread heart with the letters B + G (Bert + Gabriella).

Around Saint Lucy's Day, Bert writes over Åke driving engine tuned moped, and throws it into the lake of Nöckeln, later reporting it stolen.

Bert also visits Dalecarlia for a bass seminar, and being out of money, he stands alone by the country road hitchhiking home.

Hoping to ride with some hot girls, but instead encounters a German family with an Audi car on their way to Öreskoga to visit some friends, dropping off Bert at the town square.