During a school trip with his parallel class, Bert plans to make a move on Paulina. At the same time, the bus gets stuck in the middle of the forest. Lill-Erik seizes the opportunity to take a pee, only to be left behind by the bus. The sun is shining and it's summer vacation. Bert wants to go to the beach and check out the girls in bikinis in general, and Paulina in particular. Bert's dad is goin...

The film is based on a series of immensely popular Swedish children's books, about the boy Bert, who is just hitting puberty and having the usual problems with it. But that's where the usual ends abruptly.

The first appearance on screen for Bert Ljung, a normal teenager who's diary Swedes have been able to follow in well over ten books now. As in the books, he fights spots, looks for girls, runs his moped, plays with his weird friends Ake and Erik, and a lot of other stuff teenagers are supposed to do.

Harry Lund is having a bad day. First he gets fired. And then loses his entire fortune at an illegal gambling club. On his way out, he is assaulted and drugged by unknown men, and wakes up in a car with another man. A very dead man. A very murdered man. And Harry's penknife sticks out of his body. Harry flees in panic to Stockholm. And now not only the bad guys are close on his heels - but also th...

The ten year old Nisse suffers from acute asthma and is rushed to the hospital. There he meets Lelle who is a bitter, lonely and seriously ill twelve-year-old. Lelle, who never gets any visits treats Nisse kindly. Lelle inaugurates Nisse in his secret plan to build a giant Zeppelin and steal the food available in the hospital's underground reserves.

Bert is finally turning 13. After years of waiting, he is finally becoming a teenager. For his birthday, he wants Rebecka from the parallel class, wrapped in shiny foil or jumping out of a cake. The worst thing that can happen in life is a health check, especially if you are 13 years old. Bert, Åke, Klimpen, Torleif, and the other boys in the class sit petrified with fear, waiting for the extremel...

During one single day a number of life destinies cross one another. It becomes a night for the involved they will never forget, a night when the coincidences are going to change their lives forever.

Harry Lund is having a bad day. First he gets fired. And then loses his entire fortune at an illegal gambling club. On his way out, he is assaulted and drugged by unknown men, and wakes up in a car with another man. A very dead man. A very murdered man. And Harry's penknife sticks out of his body. Harry flees in panic to Stockholm. And now not only the bad guys are close on his heels - but also th...

The enthusiastic Reine is forced to take a job as a social worker at Kumla prison.

The film is based on a series of immensely popular Swedish children's books, about the boy Bert, who is just hitting puberty and having the usual problems with it. But that's where the usual ends abruptly.