Roberta (also referred to as Bobbie), Peter and Phyllis reside in a comfortable home in London with a wonderful mom and father in addition to a house maid. One day their daddy leaves home with two men. He is in fact eliminated to jail however the kids do not know this in the beginning. When he leaves and does not return, they need to relocate to a bad cottage in the nation (rural location) near a railway station. The children end up being acquainted with the passing trains, the employees at the train station and signal-box, and life in a town while their mother struggles to make ends meet by writing stories.
They find out to deal with what little they have and they get used to being bad. They likewise learn not to take coal from the railway station, even if they have so little to keep warm. They have different experiences – stopping a train when a landslide covers the tracks, discovering a hurt older kid in the train tunnel and getting aid, while handling the mystery of their daddies disappearance.
In some cases they argue and have crises, but in time they make many brand-new buddies.
They also experience amusing adventures aplenty which happen near the railway and the canal. The children develop the habit of waving to the train as it goes past and sometimes the people in the coaches wave back. Their friendly gestures forge a special friendship with one person in particular, who goes by in the train.
He then eventually gets to know them, and helps them out in various ways. Then, one day a train calls at the station and the children are pleasantly surprised to see their father. They are finally re-united.