1938년, 긴장이 흐르는 뮌헨 회담. 각자의 정부를 대표하여 서로의 맞은편에 앉은 두 옛 친구는 어쩔 수 없이 첩보 활동에 발을 담근다. 나치 독일의 비밀을 알려야 하기에.
George MacKay
Hugh Legat
Jannis Niewöhner
Paul von Hartman
Sandra Hüller
Helen Winter
Jeremy Irons
Neville Chamberlain
August Diehl
Franz Sauer
Ulrich Matthes
Adolf Hitler
Mark Lewis Jones
Sir Osmund Cleverly
Liv Lisa Fries
Lenya
Alex Jennings
Sir Horace Wilson
Martin Kiefer
Heinrich Himmler
Robert Bathurst
Sir Nevile Henderson
Marc Limpach
Dr. Paul Schmidt
Jessica Brown Findlay
Pamela Legat
Anjli Mohindra
Joan
Jeremy Mockridge
Richard
Hannes Wegener
Erich Kordt
Raphael Sowole
Cecil Syers
Ludwig Simon
Jakob
Nellie Thalbach
Charlotte
Nicholas Farrell
Sir Alexander Cadogan
Rainer Sellien
Hans Oster
Abigail Cruttenden
Anne Chamberlain
Nicholas Shaw
Parliamentary Aide James Berwick
Richard Dillane
Colonel Menzies
Domenico Fortunato
Benito Mussolini
Stéphane Boucher
Edouard Daladier
Margit Bendokat
Nurse Ida
Ryan Wichert