A teenager named Light Yagami, who finds a notebook dropped by a rogue Shinigami, or death god. Once he discovers that any human whose name is written in the notebook dies, he begins to use it as a vigilante and bring justice to criminals. However, as criminals begin dropping dead left and right, the authorities become suspicious and turn to genius detective L to try and track down the killer. A deadly game of wits begins as Light tries to stay one step ahead of the police with Light hot on his heels on pursuit.