The White Demon

After spending five years in Brazil, Hans Albers returns to his family in Germany only to discover that his sister, Gerda Maurus, a noted opera singer, has become a morphine addict. He takes Maurus to a sanitarium so she can be freed from her addiction. However, Peter Lorre, the hunchbacked leader of the dope-smuggling outfit, fears Maurus will expose his operation, so he has her kidnaped. Albers teams up with Trude von Molo, another opera singer whom he initially suspects to be a gang member, to discover what's going on. Later Albers finds that the opera company's makeup jars have been used to hide the drugs. He rescues his sister and exposes a well-known industri...