Family saga depicting the eternal relationship of blood between a father and son, but also the strength of friendship that allows you to find a real, deep bond between people strangers to each other.  The main character of this story, 14-year-old Maciek Łańko, lives in an orphanage. His mother is dead, he doesn't know his father, actually knows nothing for sure about him. Meanwhile, Władysław Michalski, an officer - mechanic of a merchant ship, learns that Maciej is his son. She wants to meet the boy, so she takes him to Gdańsk for a day, pretending to be his "uncle". The time spent together results in mutual sympathy, the man and the boy would like to stay together.