The Ganges shapes Indian civilization as it flows from the Himalayan foothills through vast plains, where tigers, elephants and buffalo once roamed. The river influenced empires, palaces and colonial cities, and now, festivals like the Kumbh Mela celebrate it. Despite population density, wildlife thrives, but dolphins and crocodiles are endangered, surviving in remote river stretches.

The Ganges and Brahmaputra merge, creating the world's largest delta. In this wild habitat, the tiger still reigns. Meanwhile, people and wildlife adapt to extreme weather in the monsoons and hurricanes as Kolkata and Dhaka meet the vast wetlands, including the ancient Sundarbans mangrove swamps. The wetlands host diverse species like giant lizards, crocodiles, deer, monkeys and the majestic Bengal tigers, rarely captured on film before.