When Håkan's mother Karin, who usually does most of the work in the family, becomes so stressed at the beginning of December that she breaks down and has to be admitted to a psychiatric hospital, there is a crisis, because Christmas is coming soon. Who will clean up, decorate and buy Christmas presents? And above all, where will the money come from?

All Max’s previous dreams of a pleasant life as a big brother are shattered by the screaming and demanding little brat that is his new-born little sister. Max becomes extremely jealous, but luckily he soon gets a new friend: Josef, a talking turtle. The turtle is quite mean, but eventually he gains Max’s trust. The closer Max gets to the turtle, the worse the relationship with his parents seems to become. Soon, there is no other solution for Max than to run away from home.

Nisse shows up and is held accountable for everything that has gone wrong throughout Swedish history. Could Carl-Michael Bellman play the lute, even as he was always drunk? Why did the Castle Tre Kronor really burn to the ground? Did Queen Kristina abdicate and move to Rome? Did Sven Hedin end up in Asia or did he get stuck somewhere along the way? Why did Gustav Vasa have such a silly pot-head hairstyle and did Alfred Nobel really invent the dynamite? Only Nisse Hult has the answers to this.

Bellman and his wife Lovisa live in a loving marriage, but in extreme poverty. They struggle to keep the family together and Lovisa tries to persuade Bellman to perform in order to earn a livelihood.

It's summer and young Sickan, Vanheden and Harry devise an ingenious plot to get an autograph from the famous Dani D., who doesn't sign them.