September 1941: Bernie Gunther's old boss, Reinhard Heydrich, orders him to Prague to stay at his country house. When a body is found in a room locked from the inside, the spotlight falls on Bernie to solve the mystery. If he fails to do so, he knows what is at stake – the reputation of Heydrich, a man who does not like to lose face. So begins the most diplomatically sensitive case of Bernie Gunther's police career.