One evening two strangers come to their beautiful villa and take their father away. No one will tell them where he has gone, or why. Soon after their father’s disappearance, the family moves to a tiny house near a busy railroad. The children find plenty of excitement: a landslide, a burning barge, and a stranded boy in a railway tunnel. But through all their adventures, the children cannot help thinking about their father. What happened to him? Will he ever come home?