For his sense of humor, the postman Brabec is a welcome guest of the revue theater, whose director Holt wears letters from admirers every day. Holt's fans also include Brabc's sister Anna. The girl would like to go to the theater, but so far she works as a gentleman for the actress Veldenová. A new review is being rehearsed, the author's name is secret. Velden will return the role just before the premiere, because she doesn't like it. Prompt Brabec introduces the director to a nurse who can memorize all tasks. Anny is accepted, you just need the permission of the author. Brabec finds out that he is the Minister of Posts, who took part in a postal party and who really liked his sister's amateur performance.