From the international bestseller and winner of the prestigious Crime Writers' Association Gold Dagger comes William Brodrick's most suspenseful book to date - an unforgettable tale of love, death, and redemption.

In present-day Cambridge Father Anselm, a brilliant Gilbertine monk, receives a visit from an old friend with a dangerous story to tell - the story of a woman betrayed by someone close to her… someone still unknown. As a young woman, Roza Mojeska was part of an underground resistance group in Communist Poland. But after her arrest, a Stasi officer makes her a devil's bargain - and a terrible choice is made. Now, fifty years later, Anselm is called upon to investigate both Roza's story and a mystery dating back to the early 1980s. As he peels back years of history, he exposes a truth that an entire generation was killed to keep hidden.