He saved a life—but unleashed a monster.
Dr. Kenzo Tenma is a brilliant neurosurgeon in Germany with a promising future—until one fateful choice changes everything. When he saves the life of a young boy instead of a powerful politician, his career and reputation collapse. But years later, that same boy reappears, grown into a ruthless serial killer. Determined to stop the monster he once saved, Tenma is drawn into a dark web of conspiracy, moral dilemmas, and the terrifying question of what makes a human a monster.