On his first day as a fourth-grader, Sune is welcomed by an unwanted surprise. A new boy is in his seat, and he's everything Sune wants to be. Not only that, but his name is also Sune - it's the worst possible start to the fourth grade.

Nelly and her dog London are about to spend autumn break with her uncle Hannibal. Soon she noticed that he doesn't live a quiet life. Her uncle is a Monster agent. Nelly gets dragged in to an adventure filled with ghosts, vampires and werewolves.

The Andersson family and the Blixt family is going to Karin's aunt Hulda to celebrate Midsummer. But just before they leave, Sophie breaks up with Sune! The disaster is gigantic. Sune decides to win Sophie back by celebrating a truly romantic midsummer with her - just like mom and dad did 20 years ago. But the question is whether Sune thinks too much about everything being good in his way, and forgets that not everyone thinks like him ...