A new adventure begins on the Tea Horse Road! Kian84 sets off before the other members to arrive in Nepal. His adventure begins in the highlands, where he experiences the life of a Sherpa by carrying loads through the mountains and valleys. He also meets villagers on the way and befriends them.

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After Kian84 is done experiencing life as a Sherpa in the Himalayas, he reunites with Dex, Si Eon, and Pani Bottle. The four head to Pokhara and look for places to grab dinner. The next day, they entertain themselves at an amusement park, which to their surprise, is run manually.

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The Four Brothers arrive at the Gurkha Academy. Along with students who strive to become Gurkhas, they challenge themselves with tough physical exercise. Afterward, they take English and math classes and make friends along the way. Will they be able to survive the tough Gurkha preparation?

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After deciding to spend the night at the Gurkha Academy, the Four Brothers run the doko race. While they must run 3km with a heavy load on their backs, they are determined not to stop. Afterward, they head to Tangting, a Gurung village where they plan to camp the night.

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The Four Brothers camp in Tangting and prepare Korean food with the little ingredients they have. Afterward, they head to Kathmandu where they find a luxurious lodging with a swimming pool and take a group photo in traditional Nepali clothes before Dex's departure.

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While Dex returns to Korea, the remaining three take a flight to China where they will explore the night market and the Tea Horse Road and meet minority groups. Kian84 is desperate to meet the Nakhi people while Si Eon prepares a surprise for his two younger brothers.

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After renting a car, the Three Brothers finally reach a Nakhi village. They meet Nakhi sisters who are happy to give them a tour around the village and help them meet the Dongba. Afterward, the Three Brothers help out with the farm work and get ready to set off to their last destination of the trip.

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The final day of the brothers' adventure has finally come. Kian84 prepares to check an item off his bucket list by doing the 5-point prostration, and the Three Brothers prepare themselves for this final activity. At last, they wrap up the show by sharing their remarks and reflecting on it.

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