The likeable and charming Vanda Karhanová has problems in every job because of her appearance. So when she is about to start a new job, she decides to decisively prevent similar problems. She adjusts and dresses in a way that men do not notice her and do not pay attention to her. She has no idea that she will cause even more problems for herself, and not only because she now bears an uncanny resemblance to the millionaire Czech-American Ruth Baretová, who ran away from home to avoid getting married. First, Vanda is mistakenly arrested and ends up in the police station, so she cannot return to work. At the factory, they suspect her of having disappeared with a large sum of money that they had entrusted to her to deposit in the bank. Then the whole situation is complicated by the arrival of the real Miss Baretová.