Director Richard Harris
Synopsis: Three renowned Australasian cave divers come to the Canadian Rockies in winter to dive a frigid 900-meter sump in Castleguard Cave, Canada’s longest, to see what lies on the other side. This passage was unexplored for years. Why? Does it go? Over several freezing days, they struggle hauling heavy and sensitive gear through tight, miserable passages in pursuit of their goal to explore the unknown cave beyond.