The young married couple - photographer Marie (Marta Vancurová) and civil engineering student Petr (Vlastimil Harapes) - live in a cozy attic flat with their four-year-old daughter Maruska. Petr sometimes goes out for a beer with other students and one night brings a couple of them - hungry and loud - back home with him in early morning hours, much to Marie's discontent. But the two young people have a strong and loving relationship and when Maruska suddenly falls ill they are very distressed.