The members gather in Seoul for the first time in a long while. They divide into teams of two to complete missions in various parts of the city. Their first mission is to find the pieces of a puzzle scattered all over the palaces. At Changdeokgung Palace, they must play a game with a special guest to win a puzzle piece. Which team will obtain all the pieces first and win first place? Stay tuned to find out! (Source: Viu)