A shark shoots skyward, tackling a herd of seals, as National Geographic expert Ryan Johnson heads to sea with researcher Alta de Vos. Join the pair as they unravel a mystery surrounding Seal Island, located at the southern tip of Africa. Plunge into waters where tens of thousands of seals must cross shark-infested ocean every day in order to survive. It's a dance of death between the ultimate predator and it's acrobatic prey. Explore what seals do to avoid the great whites jaws.