Professor Philip Mortimer has decided to spend his vacation in Cairo with his faithful servant, Nasir. He intends to find his old friend, Professor Ahmed Rassim Bey, curator of the Egyptian Antiquities Museum, who offers him the fantastic opportunity to satisfy his passion for Egyptology. Professor Bey invited him to participate in the deciphering of his last finds, in this case the papyrus from a cardboarding of mummy of the Ptolemies' era. His enthusiasm is such that he is not worried about Nasir's suspicions, which, as soon as they arrived at the airport, has the impression that they are followed by a mysterious black " Lincoln ". He plunges with delights into the mysteries of ancient Egyptology. And what is not his stupidity to discover that one of the fragments seems to have been written by Manethon, the only historian of Egyptian race and whose work had been lost for two thousand years. Mortimeless in the pitfall of the pitfall, the character of the crime, the character of the crime, the character of the crime goes to surprise.