The Soviet Union 1956: after Stalin's death, a violent regime is beginning to fracture. It leaves behind a society where the police are the criminals, and the criminals are innocent. Stalin's successor Khrushchev pledges reform. But there are forces at work that are unable to forgive or forget the past.

Leo Demidov, former MGB officer, is facing his own turmoil. The two young girls he and his wife Raisa adopted have yet to forgive him for his part in the brutal murder of their parents. They are not alone. Leo, Raisa and their family are in grave danger from someone with a grudge against Leo. Someone transformed beyond recognition into the perfect model of vengeance. Leo's desperate, personal mission to save his family will take him from the harsh Siberian Gulags, to the depths of the criminal underworld, to the centre of the Hungarian uprising - and into a hell where redemption is as brittle as glass.