The chapter opens with the arrival of the chan family, who have just returned from a trip to the seashore. The chans are excited to be back in their home, but they are also worried about their son, who has been crying all day. They are worried that he will not be able to sleep because of his mother's absence, but he is calm and content now. The family is also concerned about the baby, who is getting hotter and hotter, and the doctor is worried about the ship in the bottle.