A couple of beautiful girls are murdered while sunbathing at a luxury hotel. The killer too is murdered, but able to reveal – before dying - that they were disposed of because the “knew too much”. Something bad is being planned in Beirut, and it has something to do with a man called The Sheikh, who has only four fingers. It seems this isn’t a lone incident. The Sheikh is also thought to be behind the assassination of several prominent scientists.

L'agent 505 Richard Blake d'Interpol est aux prises avec un criminel mystérieux qui se fait appeler « le cheikh » et menace d'annihiler la ville de Beyrouth en la bombardant de mercure radioactif.

Agent 505, und sein Assistent Bobby O Toole sollen Beirut vor einem gefährlichen Verbrechersyndikat retten, welches die Stadt durch eine Quecksilberbombe vernichten will. Anscheinend ist Omar Abdullah, ein Nachtklubbesitzer, der Drahtzieher der Aktion.