For months, the two paratroopers lived in the shadows of Prague. Aided by the courageous Czech resistance, they moved between safe houses, constantly dodging the Gestapo. They watched, waited, and learned the habits of their target. They discovered a vulnerability: every day, Heydrich traveled from his villa to Prague Castle in an open-topped Mercedes, usually without an armed escort. He felt untouchable.

Betrayed by a fellow paratrooper lured by a massive reward, Gabčík, Kubiš, and five other resistance members were cornered in the Saints Cyril and Methodius Cathedral. For hours, they fought off hundreds of SS troops in a fierce siege. When their ammunition ran low and the Germans began flooding the crypt with water, the brave men chose their own end rather than capture.

The silence of the Bohemian night was shattered only by the whistling wind as Jozef Gabčík and Jan Kubiš tumbled from the belly of a British Halifax bomber. It was December 1941. Below them lay the occupied Protectorate of Bohemia and Moravia, a land suffocating under the iron grip of the man known as the Butcher of Prague: Reinhard Heydrich.