Answer:
The Wakatsuki's family fishing boat is going out to sea. All of a sudden, it turns around and comes back to the island. They hear that Pearl Harbor has been bombed. Papa decides to burn the Japanese flag and any papers that he has that connects him with Japan. He is then arrested for allegedly delivering oil to Japanese submarines. He is gone for a year.
Step-by-step explanation:
This is about prewar American life and it foreshadows the suddenness of the attack on Pearl Harbor and how the US entered into WW2. The father is living a life like the "american dream". Something interesting that this story points out is how so many americans were not even familiar with Pearl Harbor before it was bombed. Papa is accused of spying and betrayal again his country.