A master of disguise, the notorious "Ringer" has returned to London and is sending threatening messages to the criminal Maurice Meister. Inspector Wenbury of Scotland Yard is deputed to capture the elusive Ringer before he is able to murder Meister.
It is Lamač's second adaptation from a novel by Wallace, after The Squeaker, the year before,[3] both being the first sound film adaptations of Wallace books in German cinema.[4]