Pierrot and Dickie have completed their training as spaceship pilots and are now looking forward to new challenges. Soon, the two arrive for their first mission, which is to identify an unknown flying object.

Heidi and Peter manage to trick Karl and Theresa into telling them where Peter’s treasure chest is hidden. They bring the chest back to the tree house. But someone has been spying on them!

The treasure hunt can begin! The two teams have been given different clues by Karl, and are now setting out on the adventure.

Leipzig, 1989: Twelve-year-old Fritzi lovingly looks after a little dog belonging to her best friend, Sophie, who has apparently gone on summer vacation with her family in Hungary. But when Sophie doesn’t return in the fall, it becomes clear that her family actually fled to West Germany. Fritzi courageously sets out to return Sputnik to Sophie… and gets caught up in a movement that’s changing the future of the country.

Heidi and her grandfather ride a sled through the valley — it’s her first time, and she loves it! Peter, meanwhile, is having a rough time in class, and the teacher isn’t going easy on any of the students today.

Karl discovers that a fossil has been taken from his collection. He accuses Heidi and Peter—but the culprit turns out to be someone else.

Aunt Dete brings Heidi to the beautiful Alpine village of Dörfli to live with her grandfather, Alm-Öhi. But there are many rumors going around about him, and Heidi doesn’t exactly receive the warmest welcome from the local children.

Cettina reads Part 2 of "Das Aschenputtel," a fairy tale known in English as "Cinderella." (By the way, you'll notice that the German word for Cinderella is neuter – which means that "es/ihm" here translates to "she/her.")