It was a privilege for the boy to join his father on a business trip, but unfortunately after this trip his respect for his parents was completely lost. He was around 10. He never mentioned this trip to anyone ever after. Now he's forty, and he has to accompany his father again, this time on the old man's last homecoming journey. He brought his own son, and didn't realize that he was to learn something about being a father at the end of the day.