Comedy inspired by paperback crime novels tells the story of an adventurous search for a mysterious murderer who just after the end of the First World War has begun a rampage in Wilson City, a jerkwater town somewhere in Central Europe. The investigation is being led by an inhomogeneous pair of detectives - a greenhorn and local police cadet named Kvido Eisner (Vojtech Dyk) and an experienced FBI officer Aaron Food (JirÑ Machácek), who has been sent to Europe by US President Woodrow Wilson himself.