By Gordon Snell.
The friendship between elderly Mrs Fry and 11-year-old Sophie is exciting for them both, as they create a fantasy world based on Mrs Fry's thrilling - if unreliable - wartime memories.
But as they immerse themselves deeper in the world of codes, spies and disguises, they begin to expose themselves to real danger.
With Victoria O'Donnell, Jean Boht and Rachel Atkins.
Director Cathryn Horn.