Within the Kanto region of Japan, Light Yagami: an intelligent and distinguished yet disaffected Japanese college student stumbles across a mysterious dark-colored notebook, with the words: "Death Note" marked on the cover, while returning home from his classes. The Death Note's instructions claim that if a person's name is written within while picturing that person's face, he or she will die. Light is initially skeptical of the Death Note's authenticity, but after experimenting with it on a convicted criminal, he realizes it is real. After experimenting with it on his second victim: an accquitted felon named Takuo Shibuimaru and meeting with the previous owner of the Death Note, a demonic Shinigami named Ryuk (Death Note), Light begins to see the potential of the Death Note's god-like abilities and eventually decides to use the notebook to kill those whom he deems to be morally unworthy of life or impede his plans to change the world. He begins using the Death Note to kill numerous known criminals, terrorists and convicted felons around the world, becoming a near-mythical vigilante known as "Kira", which is the Japanese trans-literation of the word: killer and who is both beloved and feared by the world-wide media and public.
Picking up where the first one leaves off, Light joins the task force searching for Kira in an effort to avert suspicion from himself---and get rid of L.
このノートに名前を書かれた人間は死ぬ―。犯罪のない社会を目指し、デスノートで世界を変えようとした“キラ”こと夜神月。暴走する彼を阻止しようとした世界的名探偵“L”。天才VS天才の対決から10年経ったある日、世界中のネット回線がジャックされ、“キラ”によるメッセージが発信された―。「デスノートを手に入れろ―」死神により地上にもたらされた6冊のデスノート。同時多発的に発生する大量の殺人事件。そんななか、三島が率いるデスノート対策本部に、Lの後継者･竜崎が加わり、無差別殺人の現場で一冊のデスノートを手に入れる。一方、その現場には、キラ信奉者･紫苑の姿が―。今、それぞれの譲れない“正義”を賭けた、3人の壮絶な頭脳戦が始まる―!