A team of Egyptian anti-narcotic agents led by Colonel Youssef Bey (Eric Portman), the chief of the Anti-Narcotic Bureau, and his new assistant Lieutenant Mourad (Laurence Harvey), recently relocated from Paris with his wife Marie (Maria Mauban), try to prevent shipments of drugs crossing the southern Egyptian border. They are constantly on alert as even camel caravans are suspect in smuggling narcotics.