In early 20th century Czechoslovakia, a gravely ill chemist recalls his discovery of a powerful explosive and how it landed in the hands of anarchists.

Karel Höger
as Prokop

Florence Marly
as Princess Wilhelmina Hagen

Jiří Plachý
as D'Hemon

Nataša Tanská
as Anna Tomes

František Smolík
as Dr. Tomeš

Miroslav Homola
as Jiří Tomeš

Eduard Linkers
as Carson

Vlasta Fabianová
as The Woman with the Veil

Jaroslav Průcha
as

Bedřich Vrbský
as Baron Rohn