Welcome to Berlin in April 1964, the imperial capital of Nazi Germany, and the largest city in the world at that time. The third Reich is about to celebrate Adolf Hitler's 75th birthday; at the same time, US President Joseph Kennedy will also visit Germany to ease the virtue cold war that has lasted for nearly two decades. On the banks of Lake Havel in the western suburbs of Berlin, a young student of an SS school who ran in the morning found the body of an old man. Who's he? And who killed him? What was the killer's motive? Interpol officer Xavier Mach was ordered to investigate the case, only to gradually discover the astonishing plot of SS leader Reinhard Heydrich. The simplified Chinese version of this book is serialized in the excerpt of War Research Book No. 21, 23 and 25 of Inner Mongolia people's Publishing House.