After a young man is killed in an unexplored subterranean cavern and his girlfriend driven mad by something she saw there, a track found at the scene cannot be identified with any known animal and thus a scientific expedition is launched to find out just what it is that is living there.

• DirectorAlfredo B. Crevenna
• Release2 September 1965
• Genre
  Science Fiction / Horror
• Duration1h 25m
• Budget?
• Revenue?
• Rate
  

  5.9
  19 reviews
• Productions

  Producciones Sotomayor