In the Second World War, hundreds of thousands of children were evacuated from British cities and sent to areas of the country where it was regarded that they would be safer from bombing. This Government operation was named "Pied Piper". The first evacuations were in 1939 and the second wave in 1940, at the time of the Blitz. Children went to stay with complete strangers, who had been deemed by the authorities to have spare space in their homes. The hosts were obliged to take the children. Many were unenthusiastic about having a young guest staying with them for an unspecified length of time and there were incidences of unkindness and even cruelty. "Treason" is a story about two such city children. Judith is a twelve-year-old girl from London, an only child from a very privileged background. She finds herself billeted in a farm on the Isle of Wight. The farm is run by Mrs Orton, a widow, who lives with her twelve-year-old son, Jimmy, and her handicapped brother-in-law. They are joined by another evacuee guest, Alfie, an eleven-year-old boy from a working class family in Portsmouth. The story tells how their lives change and how the guests adapt to a very different way of life. Like all children they enjoy adventure, but the one on which they embark gets them involved in a danger to their lives and leads them to TREASON!