In this story, there is a seemingly greedy old woman who is always asking her daughter-in-law for money, and her son and his wife become fed up with the old woman’s behaviour. Naturally, there are constant quarrels in the family, and their quiet ordinary life seems to have been lost. After accidentally coming to know the family, Black Jack learns that the old woman had her young son, who was dying at the time, treated and saved by a noted doctor who claimed a great amount of money. She has, in fact, been paying for the treatment over some tens of years. Because of her great love for her son, the old woman devoted her entire life to paying for the treatment.