Package to the Sun

Strange that Elsa Carlos wartime ENSA variety artist should find herself locked up in a French Château accused of the murder of a fellow artist Sally Wolstenholme.
Stranger still when the Château was bombed and caught fire she managed to escape into Spain with the help of a young army chef, leaving the rest of the garrison for dead.
Also strange when Joan Wragg also a spinster from Clapham London, civil servant and staunch churchgoer when on a 1950's package holiday in Spain was discovered naked on an afternoon sea trip and taken for a local prostitute and arrested.
Even stranger when Elsa Carlos now working at the Casablanca Hotel as a room maid, discovered through a photograph in a newspaper taken of the naked Miss Wragg, resembled not only herself, but was also staying at the Casablanca.

Through a handsome and sympathetic Spanish inspector, Joan Wragg proved her innocence and was eventually freed to return to her hum-drum life in London, but disinclined to do so - but for what reason?