Starting at Imbak Falls, wildlife photographer Cede Prudente together with boatman Rizal start their journey down Borneo's longest river the Kinabatangan.

Travelling further down the Kinabatangan River, wildlife photographer Cede Prudente checks out a trap set to capture the elusive Clouded Leopard. We meet a man dedicated to rescuing Sun Bears from the illegal pet trade. Cede witnesses two million wrinkly bats leaving for their nightly feed as the raptors hunt them. And we meet the group trying to detect animal to human viruses.

Documenting the Kinabatangan river in Borneo, wildlife photographer Cede Prudente meets village elder Patti Arsah and his grandson. Biologist Marc Ancranez works with villagers to save humankind's closest genetic relative - the orangutan. Conservationist Luke Evans attaches a satellite tracker to a wild Saltwater Crocodile, and Cede completes his once in a lifetime journey.