Eun Ji-won, Tony An, Chun Myung-hoon and Danny Ahn meet at an empty rented house at the invitation of Moon Hee-joon but have no idea why they are there. They decide to call themselves "HOTSechgodRG".
HOTSechgodRG holds an official press conference to promote the show. They discuss their past dance routines and compare choreography.
The production team has prepared a "memory room" full of various items and memorabilia. The members of HOTSechgodRG take turns picking an item and reminiscing about the memories associated with their chosen item.
HOTSechgodRG unanimously agree to do a music video but have difficulty deciding on a song to cover. They finally decide on NRG's debut song "I Can Do It" (할 수 있어) after learning about the background story behind the song.
HOTSechgodRG prepare to record the single and film and choreograph the music video. However, they encounter difficulties along the way as they realize that their bodies are no longer as agile.
A long-time fan visits the house with special lunchboxes and tells HOTSechgodRG about the how the fans feel about their show. They decide to hold a fan meeting to thank fans for their support.
During the fan meeting, HOTSechgodRG perform their own individual solo songs and listen to fans' stories and memories.
HOTSechgodRG each invite a friend over for a mini reunion of the first generation groups and update one another about individual activities and endeavors.
HOTSechgodRG and their friends decide to play some games and two guests drop by unannounced. While Bada and the H.O.T members prepare dinner, members of the other groups sift through a box of memorabilia and photographs donated by fans.
HOTSechgodRG talk about how they each entered the K-pop industry and the beginnings of their idol groups. Members of Rainbow pay a visit and a discussion ensues as they compare and contrast what it was like to be in an idol group back then and in the present.
In a throwback to g.o.d's Baby Diaries, HOTSechgodRG is tasked with caring for a toddler for an entire day.
HOTSechgodRG prepare for their performance on Immortal Songs: Singing the Legend.
HOTSechgodRG go camping in the backyard and reflect on their performance on Immortal Songs and the success of the music video.
HOTSechgodRG reunite at the press conference to announce the second season and prepare for the promotional photo shoot. They discuss what they think about one another after filming season 1.
As the date for their magazine shoot draws closer, HOTSechgodRG must decide on a theme and what they will be wearing.
HOTSechgodRG discuss how age has caught up with them and ways to stay healthy.
HOTSechgodRG discuss the best and worst of each other's drinking habits. They get a surprise visit from their managers, who spill the beans about what it is like to work with them.
Hip-hop legend Tiger JK visits the set and reminisces with HOTSechgodRG.
HOTSechgodRG discuss their first impressions of one another's group members while they were still active.