On holiday with their mother in the Lake District in 1929 four children are allowed to sail over to the nearby island in their boat Swallow and set up camp for a few days. They soon realise this has been the territory of two other girls who sail the Amazon, and the scene is set for serious rivalry.
Virginia McKenna
Mrs. Walker
Ronald Fraser
Uncle Jim
Suzanna Hamilton
Susan Walker
Simon West
John Walker
Sophie Neville
Titty Walker
Stephen Grendon
Roger Walker
Kit Seymour
Nancy Blackett
Lesley Bennett
Peggy Blackett
