When Peter and Lotta give away one of their kittens, they find themselves having a day full of adventures.

Peter and Lotta celebrate Christmas in Sweden with their aunts and uncle, and they help them bake treats and decorate the house for the holiday, but an unexpected guest arrives and scares the children.

Peter and Lotta go on a picnic with their aunts and uncle, but while the adults are napping the children play in the rowboat, and trouble occurs when they lose the oars and float away.

Peter's search for blueberries for his mother's birthday leads him into a strange and magical adventure.