National Geographic Explorer Bertie Gregory is heading to the mighty Pacific Ocean off the coast of Central America. He's on a quest to find and film one of the greatest spectacles the high seas have to offer—a superpod of several thousand spinner dolphins. Searching in the largest wilderness on Earth isn't easy and leads to some mind-blowing animal encounters.

Bertie and his team travel to the sharkiest place on Earth to film one of the biggest schools of sharks ever as hundreds of hammerheads join in a mysterious underwater dance. To get close to these super-sensitive sharks, Bertie will have to dive in stealth mode.