A young married couple with a child share a cramped appartment with parents. The atmosphere is thick since nobody sees a solution to the situation. Their neighbour, the lonesome doctor Karel Brožek, lives in a large appartment. One day, the grandfather goes down to the cellar. After a while, the house resonates with a gun shot. Doctor Božek is found shot in his appartment. The investigators are called for and find out that it was not a suicide, even though everything leads to that conclusion. The grandfather is seen as the perpetrator: he knew what happened although he could not have heard anything in the cellar. The ostensibly shot man stands up, however, to join the others and to learn that the murder would be useless anyway. A much better way to gain a quality housing is through the building savings.