Socially anxious and under pressure at home, Kim Kibum has come to push people away and seclude himself as much as possible. He appears robotic and emotionless on the surface, but inside, he's like a bomb just waiting to go off, afraid of being around people but terrified of being alone.

Kim Jonghyun noticed Kibum immediately, drawn to his quiet and mysterious demeanor. He was instantly intrigued, and made it his mission to break through the guards Kibum put up around himself, which proves to be a much more difficult task than Jonghyun expected.