Itâs about a high school student by the name of Raito. One day he finds a strange book called Death Note. The book reads that if a humanâs name is written in the Note then that person will die in 40 seconds. At first, Raito didnât believe this, until a few experiments proved him wrong. And also, meeting the Shinigami Ryuk helped him believe in the Note. After Raito learns a bit more about the Note he begins to âCleanse the Worldâ, as he puts it. He kills off all the criminals and gains the nickname âKiraâ in the process. Now he has to cleanse the world, and help the Japanese police force try and capture âKiraâ along side Raitoâs new suspicious enemy who goes simply by the name, L.