Ver en Cuevana. A rabbi is murdered. Detective Llonrot is called in on the case and looks for a 'rabbinical explanation' for the murder. Other murders are committed and deliberate clues left in chosen locations. Llonrot, convinced he is on the trail of a 'mystical intrigue' is lured to the 'crime scene' when the tables are turned by his nemesis, the master criminal Red Scharlach.