Lake Tanganyika, one of the largest lakes on earth combines two very different yet equally magical worlds: an untouched wilderness along the shores, home to chimpanzees, elephants and antelopes and a spectacularly diverse underwater universe. The lake shares many of the ocean’s characteristics. Glorious sunsets, occasional storms with terrifying waves and waters filled with sardines, colorful fish, crabs and even sponges.

A routine drone survey turns deadly when Ryan Johnson, a marine biologist based in South Africa, films a humpback whale being attacked and strategically drowned by a Great white shark. This is a total perspective shift on a creature he's spent his life studying. To make sense of this event, Ryan follows Humpback whales on their migration, mapping their weak spots. He also takes a new look at Great White sharks. How do they become whale killers?