Captain Gang has died in a test flight accident. Dae-ik discovers a huge corruption scandal while trying to determine the cause of death. He reports it to journalist Jung-sook, but things changed in unexpected ways.
One day, 25 years ago, missing Chun-bae's letter is delivered to his cousin, Jjang-goo. The letter contains Chun-bae's lover, Bok-soon, and other people's letters. Jjang-goo finds Bok-soon to deliver the letter and meets class president Jang together. The three people recall their memories from 25 years ago, and eventually faced the person who sent the letter. Through that, the tangles begin to unravel.
Ho-bin and three friends were born and raised in Mokpo. They decide to take part in the band contest held in Jarasum after they formed the band, ‘Road No.1’. Then they come up with a plan to go there on foot in 30 days, doing busking on the road. They also contact broadcasting and join Hye-kyung, who is the producer of the broadcast company, on their journey. However, Hye-kyung looks down on what they are doing. What is worse, Ho-bin suddenly breaks away and the band ‘Road No.1’ is in crisis. Will they get through it and take part in the band contest?
