Kovács, chief cashier, is celebrating the 30th anniversary of his school-leaving exams at the grammar-school. He takes his friends to a night-club.

Solicitor Lukács is well known for his expertise in divorce. He lets a room and while he is away, Csahos, his articled clerk, in charge of business affairs in the absence of the solicitor, leaves almost all of the flat to Székely Klári, a pretty university student. Lukács, while driving his car to Siófok, accidentally bumps into his wife and their friend, Bognár Miklós. Misunderstanding the situation, he asks for a divorce.

You can get anywhere in a tailcoat. Viktor Norton, a young man imprisoned by mistake, also knows this. In Viktor’s tailcoat, he can easily get to the Excelsior Hotel, where he will meet the newly wealthy Dupont couple and their daughter Marie.