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.
Dr. Wittich is a passionate speleologist who spends more time on his research than on his fiancée Cornelia. As a result, she turns to the rich industrialist Roy, whom she eventually marries. But her heart actually belongs to the explorer and so she is drawn back to him.
A group of talented young people are dismissed from an ice dancing troupe as a result of the intrigues of Alida, the wife of impresario Gordon. Outraged, the young people leave Gordon's troupe and, having organized their own group, soon achieve success with audiences. Gordon, deprived of his talented performers, suffers a collapse and goes bankrupt.
