Extreme travelers Mark Anstice and Olly Steeds begin a unique expedition into the rainforests of West Papua to track down and live with the remarkable Kombai tribe, a people whose way of life hasn't changed since the Stone Age.

Mark and Olly learn to live off the jungle in the same manner as the Kombai.

Mark and Olly attempt to make their own treehouse, but their efforts are futile. The Kombai offer to build them their own treehouse.

Mark and Olly uncover the brutal reality of the Kombai justice system, when a murder is committed.

The tribe has a festival and invites Mark and Olly to be hosts.