Deepsea Challenge 3D 2014 follows director James Cameron as he fulfills a childhood dream of reaching the deepest part of the ocean. The documentary covers the construction of a submersible designed to withstand extreme pressure. Cameron descends to the Mariana Trenchs Challenger Deep nearly seven miles below the surface. The expedition faces technical failures and dangerous conditions during preparation and the actual dive. The film shows Cameron alone inside a cramped cockpit as he reaches the sea floor collecting samples and documenting unknown deep sea terrain. This documentary chronicles the engineering challenges and personal risks of solo exploration to the planets most remote location.