When Jungkook decides to make a deadly decision, a homeless, young boy named Jimin finds and saves him. Though Jungkook has a harsh attitude, Jimin grows fond of the man he found and persuades him to share his home with him.
While Jungkook isolates himself, Jimin tries to figure out the wealthy, complicated man he crossed paths with. After finding out they both share similar, troubling pasts, Jungkook grows to like the sweet and carefree spirit of the younger, but quickly reminds himself that he can't love due to his heart condition...
Kim Taehyung is left under the custody of his grandmother after his parents died in a car accident. Taehyung becomes an introvert and his grandmother is concern about her grandson and his future. In one of her many business trips she meets a young man by the name of Jeon Jungkook who she is fascinated with because of his great personality and heart. As she feels closer to her death, she decides to help her grandson to enjoy life by leaving a special LIST for him to follow as one of her last wishes in her will. She forces Taehyung to live his hometown and move to a new country, in a new city where he meets Jeon Jungkook who ultimately helps him complete The List.