To track down New Zealand's monster great whites, researchers build a submersible designed to look like a shark and pilot it deep into what they believe could be a mating ground - the Holy Grail of shark science.

We have all seen the movies, sharks jumping into boats, circling in tornados, and risking their lives to attack humans. Could these shark feasts happen? Ian Ziering and Tara Reid pick up their chainsaws once again to see if a Real Sharknado could happen.

Dr. Craig O'Connell and Marc Payne return to where they unexpectedly filmed a juvenile great white during a past mission. Believing there's a nursery nearby, they follow the trail to a discovery that could change everything we know about great whites.