Heidi lives with Alp-Öhi n the Swiss Alps in the summer, where she helps Peter tend the goats. In winter, she stays in the village and attends school. One day, a letter arrives from Heidi's German friend, Klara Sesemann, announcing her visit. Klara indeed appears the next summer along with her grandmother and the prim governess Miss Rottenmeyer. Klara is quickly convinced to stay with Heidi, but Peter becomes resentful that Heidi now spends so little time with him...

Two nine-year-old girls—rude Luise Palfy and respectful shy Lotte Körner—meet on a summer camp. Apart from their different hair-do, they look alike. They have never seen each other before, but soon find out that they are identical twins. It turns out that their parents divorced, each keeping one of the girls. They decide to trade places at the end of the summer. Lottie curls her hair, Lisa braids hers, and both go off to where they have never been before. The adventure begins.

Heidi, a young orphan girl living with her aunt in Frankfurt, is forced to move to the Swiss Alps to live with her ornery grandfather. At first, he resents her presence, but, after a short while, Heidi manages to pierce his gruff exterior, and the two become close. She also befriends a young shepherd named Peter. After three years, Heidi's aunt arrives and demands Heidi's return to Frankfurt.

Maria Thaler, the recently widowed landlady of an inn in the picturesque Weineck in the Wachau region, gives birth to twins. At the same time, kitchen maid Rosina also gives birth to twins in the same house, albeit illegitimate. Mayor Scherzinger exploits the growing rumor that quadruplets were born in the inn to market Weineck as a tourist attraction. With complete success!

Maria lives with her grandfather in a secluded fishing hut on Lake Constance where they barely survive on what the fishing grounds provide. The daughters from next door make things worse by scaring away the fish with their motorboat. But Hans, the son of a rich family, falls in love with Maria and tries to help her, although she is unsure if he can be trusted.

The conversion of a pedantic family tyrant into an understanding husband and father.