The cast of 'Guardian, The Lonely And Great God,' Gong Yoo, Kim Go Eun, Lee Dong Wook, and Yoo In Na, go on a trip for the celebration of their drama’s 10th anniversary. From the beginning of the trip, they start bickering with each other mischievously. However, when they visit the famous filming location of the drama, they are moved, feeling as if they have travelled back 10 years. Revelling in their sentimentality, they pose by the sea, taking pictures, rousing their memories.

Moved by the view of the sea, they are enjoying their trip. First, they choose the room to sleep in and go to a supermarket for dinner. While preparing for the party, their colleagues who shined as scene stealers at the drama, Kim Byoung Cheol, EL, and Park Gyeong Hye, come to their party. With the welcoming atmosphere, they recall their memories regarding their makeup at the drama and how they struggled during the shoot.

While the actors of 'Guardian: The Lonely And Great God' are enjoying their party to celebrate the 10th anniversary of their drama, they start a quiz hosted by In Na. The quiz is about common sense about the drama and its famous lines. The winner of this game will get a prize of Korean beef. From the beginning, Gong Yoo shows his competitive spirit, shouting out loud to get the chance. And the actors try to flatter In Na to get just a single point. Who will be the winner of this game?

The last day of their trip arrives. In Na and Dong Wook, who woke up early, buy some coffee for Go Eun and Gong Yoo and take a walk together along the beach. After having a relaxing morning break, they play Yutnori to decide who will wash the breakfast dishes. Dong Wook teams up with Go Eun, and Gong Yoo teams up with In Na. Which team will win in this game? They also conduct activities such as riding a bicycle and taking a photo to celebrate their 10th anniversary.