Budapest's dark history finally catches up with Detective Balthazar Kovacs in the final instalment in Adam LeBor's Hungarian crime trilogy. Budapest, January 2016. The Danube is grey and half-frozen, covered with ice, and the city seems to have gone into hibernation. But not for Detective Balthazar Kovacs. He has been called out to investigate the disappearance of a young Israeli historian, Elad Harari. Harari was working in the archives of the city's Jewish museum, researching what happened to the assets of the Hungarian Jews murdered in the Holocaust. His work could bring justice to the families of those who died, but it seems not everyone welcomed his probing into the country's darkest period. Balthazar soon finds that there are powerful forces out to sabotage his investigation, as bizarre warnings escalate to violent attacks. When they finally make their demand, Balthazar will be forced to make an impossible decision: give up real evidence of horrific wrongdoing in Hungary's past, or see the young historian die.