It is an adventure in which Tintin investigates the supporters of Sheikh Bab El Ehr's overthrow of Mohammed Ben Kalish Ezab, the Emir of Khemed.
After watching a movie, Tintin and Captain Haddock round a corner and bump into General Alcazar, who drops his wallet. Tintin attempts to return it, but the hotel he claimed to be staying at has never heard of him, and when Tintin calls a phone number found in his wallet, the man refuses to talk to him. When Tintin and Haddock return home, they discover that the Emir's bratty, incorrigibly spoiled son Abdullah has been sent there for protection, along with a colorful entourage of servants and dignitaries who have established abedouin-bivouac in the great hall of Marlinspike Hall. Abdullah proceeds to cause chaos at Marlinspike with his practical jokes. Thomson and Thompson inform Tintin that they know of his meeting with Alcazar due to their investigation of an arms dealer called Dawson. They then tell him the name of the real hotel where the General is staying. At the hotel, Tintin and Haddock see Alcazar talking with Dawson, whom Tintin recognises as an enemy he met inThe Blue Lotus…