An international team of scientists, cavers and wildlife filmmakers explores one of the last great unspoilt jungle wildernesses on Earth. Based at the foot of Mount Bosavi, a giant extinct volcano covered in thick and largely unexplored rainforest, the team search for the animals that live there with the help of trackers from a remote tribe. Finds include the nest of the world's smallest parrot, a talking beetle, and types of frog, gecko and bat that are completely new to science.
The team of scientists and filmmakers push deeper into the New Guinea rainforest, and enlists the help of a tribe to find and film the extraordinary birds of paradise as they perform their bizarre courtship displays. One member of the team manhandles a giant crocodile, and another is living deep underground, where he discovers a new cave system never before seen by humans.
The team descends into the crater of a giant extinct volcano covered in thick jungle. They are the first outsiders ever to enter this hidden world, which biologists have long believed could be home to spectacular new creatures. At an erupting volcano, a rare bird is discovered that depends on the hot ash for its survival. Discoveries inside the crater include two new species: a giant rat and a tree-climbing marsupial.
