Warsaw, December 1981. Martial law closes the country overnight, tanks replace taxis, and a visiting British academic is trapped inside a city that has become a prison. She sees the secret police kill a student, and from that moment she is the one being hunted. A thriller about a foreigner with no language, no papers and nowhere to go.
When intelligence agent Kathryn Woodhouse is suspected of betraying the nation, her husband - also a legendary agent - faces the ultimate test of whether to be loyal to his marriage, or his country.