Director Na Young Seok plans to send Jung Woo, Cho Jung Seok, Kang Ha Neul, and Jeong Sang Hun to Iceland without any extra clothes or luggage. They are first asked to have dinner in Gangnam-gu as a meeting, however, the dinner turns out to be their last meal in Korea before they fly to Iceland.

Three Dummies make a journey to their way to Gullfoss. During their first attempt, the weather gets bad, and they head to Hallgrimskirkja, a beautiful church. They eventually make it to Gullfoss and are in awe due to the beautiful scenery. Meanwhile, Kang Ha Neul joins the group.

Ha Neul joins them, and they have become Four Dummies. Before going hiking, they visit a flea market to buy clothes and shoes for the journey. They also decide to go Geysir, a famous hot spring in Iceland. However, the weather is very cold, and soon, it will be dark. Will they decide to go or not?

The Four Dummies continue their journey in Iceland. After a long day in the wilderness, they finally get to see the Northern Lights in the city of Vik. They are once again stunned by the beauty of Mother Nature and think of their loved ones back in Korea. For the first time, they enjoy a meal at a local restaurant and fall in love with its exotic dishes.

Everything in Iceland continues to fascinate the four dummies, and this time, they visit Jokulsarlon to see the icebergs and a beautiful ice cave that formed hundreds of years ago. At night, they drive out to see the Northern Lights again, and they enjoy themselves stargazing and making new memories together.

The cheerful members meet a fierce snow storm on their road to Reykjavik. The harsh weather condition delays their journey for a while but it does not stop them from moving forward. Once they reach Reykjavik, Sang Hun has to return early to Korea for his work, so they decide to throw a small good-bye party for him. For the last part of the journey, they split up and spend time individually to visit places of their own interest.

The four dummies complete their special trip to Iceland and back to Korea. However, the staff of Youth Over Flowers invite everyone to famous sausage restaurant in Seoul to celebrate their trip to Iceland, and hands them special gifts. Also, unrevealed scenes from the trip are ready to be aired as well! Stay tuned to check the last episode of Youth Over Flowers.