On the island of Sumatra, in Indonesia, an iconic species is barely hanging on. Orangutans are considered critically endangered. The massive wave of deforestation for oil palm production shows no sign of slowing down. Theoretically protected, the island's precious peatlands are being chewed up. Whole forests are set on fire killing every living thing in this paradise of biodiversity. But scientists have mobilized to save the remaining orangutans. In the heart of the tropical forest they do what they can to halt the carnage and rehabilitate the last few survivors of an uneven fight against a corrupt and merciless authority.