A series of mysterious murders, committed by the poison of a black Mamba, puts London in distress. Scotland Yard's Superintendent Elford suspects that the "Squeaker" is behind the murders - the mysterious stranger, the underworld is afraid of and is unsuccessfully hunted by Scotland Yard. The clever mugger grabs his share of each robbery's loot, in return for not reporting the ... (展開(kāi)全部)