Seong Yo-han is a brilliant student in high school who is known for his intelligence and good looks. However, despite his academic achievements and handsome appearance, he is often avoided and mistreated by his classmates.

This is because "his father" was a famously infamous serial killer, who was already in prison before Seong Yo-han was born.

"His mother" had changed their last names to not society whit Yo-han's father anymore in any way but people still somehow found out about it.

The students judge him harshly based on his bloodline and believe that he may follow in his father's footsteps and become a serial killer himself.

They are unaware that, Seong Yo-han didn't inherited any psychopathic traits from his father.

And unfortunately, due to the prejudiced views held by his classmates, he often feels isolated and misunderstood, struggling to connect with others and find acceptance within the community. Seong Yo-han walks through the quiet streets of the city, taking the long route home to enjoy the cool night air. He decides to take a shortcut through the abandoned school, thinking it would be a peaceful detour. However, as he approaches the school, he suddenly spots three male students he recognizes from school, all holding baseball bats.

Before Seong Yo-han can react, the three students spot him and immediately run towards him, their faces filled with malice and determination. He tries desperately to run away, but they quickly catch up to him and slam him against the wall of the abandoned school. Feeling cornered and outnumbered, Seong Yo-han instinctively tries to defend himself. He fights back with everything he's got, throwing punches and kicks to try and fend off his attackers. But he is no match against the three boys, who are armed with baseball bats and outnumber him.

He can hear the taunting voices of the students, their words cutting deep into his heart. They call him names like "monster," "psycho" and "freak" Seong Yo-han's body hits the ground with a hard thub.