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.
| Editing | Else Pankow | Editorial Production Assistant |
| Art | Robert Herlth | Production Design |
| Writing | Erich Kästner | Screenplay |
| Art | Robert Herlth | Art Direction |
| Camera | Hermann Meroth | Still Photographer |
| Production | Gustl Gotzler | Unit Production Manager |
| Sound | Erich Leistner | Sound Engineer |
| Directing | Josef von Báky | Director |
| Editing | Fritz Stapenhorst | Editor |
| Writing | Erich Kästner | Novel |
| Crew | Fritz Stapenhorst | Second Unit |
| Costume & Make-Up | Bessy Becker | Costume Design |
| Crew | Theo Nischwitz | Special Effects |
| Production | Günther Stapenhorst | Producer |
| Sound | Alois Melichar | Original Music Composer |
| Production | Werner K. Praefcke | Unit Production Manager |
| Production | Leo Höger | Unit Production Manager |
| Art | Willy Schatz | Art Direction |
| Production | Otto Lehmann | Production Manager |
| Sound | Erwin Jennewein | Sound Engineer |
| Camera | Franz Weihmayr | Director of Photography |
| Camera | Walter Riml | Director of Photography |
