While playing a prank, a young boy accidentally discovers the identity of a criminal lurking in the neighborhood.
A man tries to avenge the death of his sister, a gambling addict. Another man, an ex-convict who whistles when he commits a crime, is reunited with his blind mother.
Argentina, 1915. Accompanied by a doctor and his beautiful daughter, Köhner, a ruthless foreman who rules a yerba mate plantation with an iron fist, arrives in the city of Posadas with the purpose of hiring workers.