The marquis Galeazzo di Torre Alta is murdered by a mysterious killer who calls himself Diabolicus. His heirs are his three brothers and a sister, but all of them, with the exception of Monsignor Antonino di Torre Alta, are killed by Diabolicus. The police are unable to solve the case, but when Antonino gives his inheritance to Pasquale Bonocore, illegitimate son of his father and Pasquale is in prison and therefore can't be the killer, all the clues are in the hand of the police.
Steno | Director |
Bruno Corbucci | Screenplay |
Mariano Laurenti | First Assistant Director |
Sergio Angeloni | Makeup Artist |
Roberto Gianviti | Screenplay |
Enzo Silvestri | Sound |
Renata Clerici | Script Supervisor |
Renato Fait | Assistant Camera |
Giovanni Grimaldi | Screenplay |
Gianni Buffardi | Producer |