Follows renowned cave explorer Bill Stone as he and his team push the boundaries of what has ever been done before as they attempt one of the greatest achievements of modern exploration — to set a new world record by venturing into the bottom of what is thought to be the deepest cave in the world.

"A filmed chronicle about the construction of a 1000-foot dry-stone wall by a novice stonemason in rural Quebec. The stonemason, Chris Overing, is to complete the stone structure within eight weeks; the filmmaker, Bill Stone plans the film as a straightforward telling of this laborious yet creative task. But after Overing realizes he has woefully underestimated the time and energy required to construct the wall, both projects evolve into something altogether different." - by First Run Features

Documentary narrated by Kenneth Branagh consisting of colourised footage from World War I.