Marine biologist Greg Skomal and the REMUS SharkCam team return to Guadalupe to find the world's largest great white shark, Deep Blue. This time, they deploy two robot subs: one that dives to 300 feet, and another that goes to 2000. Together, they build a profile of how the great white uses the entire water column. The team uncovers hunting techniques and strategies great whites use to ambush their prey - and film a great white's attack on the sub!