As Kira's killings continue, the police, led by the determined and intelligent L, begin to investigate. L is a world-renowned detective who uses unconventional methods to solve cases. He becomes fascinated by the Kira case and starts to analyze the patterns and clues left behind.

The story begins with Light Yagami, a high school student who stumbles upon a supernatural notebook called the Death Note. The notebook has the power to kill anyone whose name is written in it, as long as the writer pictures the person's face while writing their name.

The Death Note series explores themes of justice, morality, and the consequences of playing god. The series raises questions about the nature of justice and whether it is ever acceptable to take the law into one's own hands.