Inspector Rizzo and Marshal Caputo go to Egypt and look for Professor Cerullo, who is missing.

Inspector Rizzo in Napoli gets a message from a policeman from South Africa who wants to meet him. Immediately before this meeting the South African policeman is killed. Dying he…

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…