After their father is mysteriously forced to leave home, the three
children and their mother leave their comfortable house in London
and go to live in a cottage in the country near a railway track.
The children soon make friends with the Station Master, the Porter
and a friendly old gentleman, who waves to them from the morning
train. Peter, Bobbie and Phyllis enjoy several exciting adventures
and even become the heroes of the village. But the mystery of their
father remains unsolved, until one day...