Professor Rutkowski teaches Medieval history at the University of Heidelberg. He drives as a tourist to a town in Dalmatia where he participated, 22 years ago, in special mission of the Gestapo. In 26 letters to Wagner, his colleague at the university, the former first lieutenant of the SS confesses his crimes. His confessions torture him, the horrors of his actions are like a vampire who lives in a demonical umbrella. This umbrella haunts Rutkowski and drives him finally into his death.