Mishima's Chapter: Rebirth

Set roughly nine years past the events of the earlier film, the episode follows Tsukuru Mishima as he joins the task force still watching for notebook-driven deaths. Matsuda clears him on a polygraph whose final question asks whether he knows of the Death Note, and Mishima passes. Once inside, the recruit fixates on the Kira case and on Light Yagami in particular, poring over trivia his colleagues find pointless, such as the brand of chips Misa once favored, until Nanase dubs him a Death Note obsessive.

When a man drops dead in the manner of Kira's old victims, Mishima and Nanase investigate and trace the cause to a toxic local flower whose poison mimics heart failure. The team arrests Rokuro Natsugawa, a lunch server who confesses he killed the victim for driving a friend to suicide years earlier, taking on the role of judge himself because no Kira existed to do it. As the story airs, an unseen figure opens a notebook and sets pen to a fresh page.

Soon Natsugawa starts raving that he is Kira and that the notebook has returned, then succumbs to cardiac arrest once guards thwart his attempt to bite through his own tongue. Criminals across the country begin dropping as they once did, and online crowds celebrate Kira's revival. The chapter borrows its subtitle, Rebirth, from the title of the anime's very first episode.