The city of Gotham was gripped by a wave of mysterious murders, all committed with a distinct and sharp German steel knife left at each crime scene. Despite the police's attempt to find the killer, the criminal remained elusive. Behind this chaos, a darker tale unfolds. Seok, an orphaned young man who had lost his parents at the age of eight, harbored a deep resentment fueled by the city's lack of justice. Their indifference fueled Seok's unwavering determination for revenge against them.