We get to follow Arne and his friends on their adventures where they encounter different challenges and do their best to solve them together. With their likeable and unique personalities – quirky, kind and brave – they make a perfect group of friends.

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.