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...
Jungkook is forced to visit the mental hospital with Taehyung, but despite his discomfort and boredom, he can't help but wonder what lies behind the doors to the forbidden room.
"Who's in there?"
"Nobody. Nobody at all."