Five years had passed since sump 5 was found in Bel Torrente cave, Sardegna, Golfo di Orosei Italy.
This year, a group of 4 divers, attempts to push the frontier further. What did they find during this 6-day long action? Spectacular videography by Oliver Schöll, and a good mixture of characters, and experts in their specialties will make this movie well remembered.