The story of the tumultuous relationship between a Jewish girl called Noemi and a Polish art student named Kamil is set at the outbreak of World War II.
The first Polish post-war comedy. Witek and Krysia, a married couple, move to Warsaw and have nowhere to stay. They rent a room in a house with many other lodgers. Witek dreams of their own house and draws a sketch of their future home, marking the place where his wife will sleep with the word "treasure". The other lodgers find the draft and a frantic search for the treasure begins.
Three provincial journeymen: a shoemaker - Szydełko, a tailor's - Igiełka, and a carpenter - Wiórek, come to Warsaw, where they end up in the "Pod Apartuszkiem" inn. Soon they unexpectedly win a million zlotys in the lottery. They divide it equally and everyone goes their own way, but they agree on "Under the Apron" next year. After a year, they all meet again. The first two lost all their money, and the third settled down and married Lucia, the daughter of a carpenter.
Two apartment house dwellers, although unrelated, share the same name. One is an older man with an appreciation for and love of classical music, while the other is a younger man addicted to swing music. The niece of the older man arrives for a visit and gets into the wrong apartment. Complications arise.