Mark experiences many unusual adventures to finally come to the realization that family and friendship are the most important. In his job, he is put in charge of a very ambitious project, but in his personal life he has unexpected problems. After he finds a backpack in the hallway of the house and tries to honestly return it, he is detained by the inspector. However, the policeman does not lock him in prison, but forces him to cooperate. Marek therefore has to curry favor with the three Grundz brothers, who cook meth in the apartment one floor below. He makes full use of his knowledge from the university of economics, the head of the Grundz family soon joins the group, and the drug trade just flourishes. Living together with new friends brings a lot of humorous, but also exciting moments. The viewer is not only captivated by the plot, but also learns a lot of interesting facts from recent and distant history.