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!