<p>HansAlbersandHeinzRühmannplaytwoconfidencetricksters.Theymanagetostopanighttrainfornefariouspurposes,andimpersonateSherlockHolmesandDrWatson.RomanticinvolvementwithtwoyoungBritishfemaletravelersensues,buttheplotdeepensintothedisappearanceofrareMauritiuspostagestampswhichtheyundertaketorecover,intheirroleasHolmesandWatson...</p>
