The film is based on Laurent Binet's novel and tracks the ascent of Reinhard Heydrich (Clarke), a key part of Hitler's Third Reich (he was known as the 'Reich Protector') and one of the terrifying architects of the Final Solution. He also became known as the highest ranking Nazi officer killed during World War II, when he was assassinated by Jan Kubis (O'Connell) and Jozef Gabcik (Reynor), resistance paratroopers.
Pike is set as Lina Heydrich, the aristocratic wife who first introduced her husband to the ideology that would come to rule his life and lead to him losing it. Wasikowska, meanwhile, will be a young woman living in occupied Prague who befriends Kubis. The book's title, incidentally, is HHhH, referring to the phrase "Hirn heißt Heydrich" ("Himmler's brain is called Heydrich"), said about the men during the war.
Jimenez adapted the script with David Farr (Hanna) and Audrey Diwan (The Connection) with a plan to start the cameras rolling this August in Prague.