Despite their busy schedule, the five families of Ssangmun-dong gather together to reminisce about the drama "Reply 1988" from 10 years ago. As if going on a time travel, the actors appear wearing the exact same outfits from the drama. Before the retreat, they first gather by family in Gapyeong and start the opening at three different locations. Trapped in 1988, they play fun games to get their money for lunch. As each family experiences unexpected reactions and twists, they show off their amazing teamwork and chemistry. They also tell touching behind-the-scenes stories and introduce their favorite items related to the drama. What memories and emotions will their reunion bring back? Stay tuned to find out!

After the allowance game, the five families of Ssangmun-dong gather at a rest stop and share a meal, reminiscing about the Ssangmuin-dong scenes from the drama ten years ago. Upon arriving at their Goseong lodging, they reflect on the 10th anniversary by taking a poster photo again. The highlight is undoubtedly Family Entertainment, where the families split into three teams and compete for the Hoeingseong Korean beef set. The first round, Speed Quiz, involves guessing names of food, places, and people. Jae Hong brings laughter to everyone as he explains Tchaikovsky. The second round features the Music Scholarship Quiz, with questions based on age and score. Bo Gum's unexpected answers and Hye Ri's continuous dance elicit laughter from everyone. After the fun games, they renew their teamwork by enjoying a barbecue dinner. How will the night of the reminiscent trip go? Stay tuned to find out!

Here comes Special Mission, Ssangmun-dong Dads' Challenge! Four Ssangmun-dong dads, Dong Il, Moo Sung, Jae Myung, and Sung Kyun, will take on a challenge for the prizes. Meanwhile, Kim Seol, who played Jin Ju in Reply 1988, the last member of Ssangmun-dong, appears suddenly and surprises everyone.