Light Yagami is a 17-year-old ace student who is bored in school, life and the state of the world. One day, coming home after school, he wrote a black notebook with “Death Note” demons. The first sentences of the book is that anyone whose name is written in it is the power of a Shinigami die. At first he dismisses it as a joke, but then realize that it is the instrument that he can change the world in a place with no crime or criminals. But they die after the first offense, the authorities have to do something and send the legendary detective L to track down the light.