France’s first nuclear submarine, Plongeur, is on her first sea trail. On board, one of the Navy’s most experienced captains and a tiny skeleton crew of sailors, engineers and scientists. The Plongeur makes her first dive and goes down, and down and down… Out of control, the submarine plummets to depth where the pressure will crush her hull, killing everyone on board. And beyond. The pressure builds, the hull protests, the crew prepare for death. The boat reaches down and finds…nothing. Her final dive continues, the pressure begins to relent, but the depth gauge is useless. They have gone miles down. Hundreds of miles, thousands… And so it goes on. And on board the crew succumb to mania and murder. Has the Plongeur left the limits of our world and gone elsewhere?  This book can I think best be described as odd. Things start off in a reasonably conventional manner; a French submarine crew take a new automatic submersible on its maiden voyage. However, the further away they get from dry land the more surreal events become. As they travel deeper and deeper, way beyond all possible depths, they start to encounter stranger and stranger phenomena.  Led by the formidable…