John Sinclair
Bill Conelly
Pater Ignatius
Kerstin Müller
Marion Baumann
Viktor Gonsoir
Willi Mallmann
Glenda Perkins
Sybille Thelen
Dr. Hollister
Bernie
Frau Kruse
Petra Klinger
Sir James Powell
SEK-Mitglied
Three girls summon a demon. John Sinclair, a British investigator for supernatural phenomena, travels to Germany to meet Kerstin who is the only girl left. But the demon wants to sacrifice her in the old cathedral of Cologne.