Keyman - The Hand of Judgement is a dark fantasy webtoon about a boy named Kigen who becomes the new Keyman, a wielder of a powerful key-shaped weapon that judges and punishes sinners. After his family is killed by a group of corrupt heroes, Kigen is taken in by a mysterious figure and trained to hunt down those who abuse their power. He ultimately seeks revenge against the fallen heroes while grappling with the morality of his role as judge, jury, and executioner. Readers enjoy the story for its intense action, morally gray themes, emotional depth, and the satisfying spectacle of corrupt villains receiving brutal, creative comeuppance.