In "Death Note," the protagonist Light Yagami acquires a powerful notebook that allows him to kill anyone by writing their name in it. Initially, Light believes that he can use this power to bring justice to the world by eliminating criminals. However, as the series progresses, Light's actions become increasingly morally questionable, blurring the lines between his pursuit of justice and his own desire for power. This exploration of the conflict between justice and morality is central to the story, as viewers are left to question whether Light's actions can truly be justified in the name of justice.