Director: Michelangelo Frammartino
Stars: Claudia Candusso, Paolo Cossi, Mila Costi, Carlos José Crespo
Genre: Drama
Country: Italy, France, Germany
The extraordinary adventure of the young members of the Piedmont Speleological Group who, having already explored all the caves of Northern Italy, changed course in August 1961 and went South to explore other caves unknown to man.