This first episode begins in Afghanistan's remote and inhospitable Wakhan Corridor: an area few Westerners have ever set foot in. Levison and his guide, Malang, need help from Kyrgyz and Wakhi tribespeople to make it to the Irshad Pass, a 5000-metre wall of snow and ice that stands between Afghanistan and Pakistan.

Levison Wood and his guide Malang Darya travel through Pakistan-controlled Kashmir and the Gilgit Valley, and aim to get as close to the heavily militarised border with India as they can, a dangerous journey that involves crossing a raging river and being met with suspicion by the local authorities. They meet a nomadic tribe that has driven herds across the Himalayas for centuries and visit a valley that has been closed to foreigners for nearly 70 years.

Levison Wood is reunited with a man who saved his life and joins pilgrims on their way to India's holiest city, where he meets a monk who claims to have gained special powers from eating human flesh. Levison then travels into Nepal, encountering dangerous wildlife and having to flee a town in the middle of the night when monsoon rains cause flooding.

Levison Wood returns to the site of his car crash to resume the journey, and is reunited with the people who saved his life. He keeps a promise to Binod by accompanying him on a trek to his family home in Pokhara, before continuing their travels with members of the Gurung tribe, who risk their lives to collect honey from wild bees living on high cliffs. They visit the site of an earthquake in 2014 and visit Kathmandu, before crossing the border into Bhutan.

Levison Wood and guide Binod Pariyar face a 30-mile trek through the jungles of Eastern Nepal, with no roads and few people to tell them they are heading in the right direction. Their journey comes to an end in Bhutan, a country rarely visited by foreigners, where they visit a holy mountain, join the celebrations for the king's birthday, and listen to local children's tales of yeti.