In World's Lost Tribes: New Adventures of Mark and Olly, explorer Mark Anstice and journalist Ollie Steeds are on an extreme mission to contact and live with the legendary Mek tribe of West Papua whose way of life has barely changed in thousands of years.

On their last adventure Mark and Olly were adopted by the elusive Kombai tribe. Now they are trekking high into the uncharted central highlands, seeking total immersion in a culture with a history of tribal war, sorcery and witchcraft.

The Mek people are an ancient tribe that has survived for thousands of years in one of the most beautiful but hostile environments on Earth and Mark and Olly are the first white expedition to enter the Merengman village, located in a part of the jungle described as "hundreds of miles of dark and screaming".

After gaining their trust, Mark and Olly will live with the tribe for four months, totally immersing themselves in their way of life where they will experience weddings, witch hunts, and axe-wielding chiefs, while traversing deadly bridges, enduring sleepless nights with the tribesmen and eating local delicacies such as tadpole kebabs and frog heads.

In their incredible adventure, Mark and Olly will attempt to gain acceptance into the village with the reward of the Mek's traditional penis gourd, and experience the chance to document the wisdom of the ancestors that will soon be lost.