A man and a woman meet in the ruins of post-war Poland. With vastly different backgrounds and temperaments, they are fatally mismatched and yet condemned to each other.

Anna, a young novitiate in 1960s Poland, is on the verge of taking her vows when she discovers a family secret dating back to the years of the German occupation.

In the Yorkshire countryside, working-class tomboy Mona meets the exotic, pampered Tamsin. To seal their friendship, Mona introduces Tamsin to her born-again Christian brother, and Mona helps Tamsin spy on…