Description
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.
Casts:
José Elías Moreno
Carlos Cortés
Kitty de Hoyos
David Reynoso
Columba Domínguez
Javier Solís
