Criminals who commit murder and robbery have died mysteriously one after another. People regard Kira, who punishes evildoers for justice, as the savior, and the police are helpless. L, a genius boy who specializes in solving strange cases, deduces that there is a 97% chance that Kira is in Japan, so he leaves Los Angeles and flies to Japan. Before leaving, L has a faint premonition that he may never come back. L and Kira Light Yagami have a head-on confrontation. At this time, a small village in Thailand has been wiped out from the earth. L does not know that a major conspiracy that can destroy the world is brewing. L sets a trap at the cost of his own life and prepares to defeat Light Yagami in one fell swoop. Unexpectedly, his long-time partner Watari dies unexpectedly. L decides to complete the tasks left by Watari in his last 23 days. A helicopter delivers a box of gifts for Watari, and inside is a boy who is the only survivor of the devastated Thai village. L learns from the disk data carried by the boy that the incident is related to a terrifying murder virus. At this time, the girl Maki comes to find Watari with her father's belongings. She is also a victim of this conspiracy. The killer who is tracking him has arrived, and L begins to flee with his two children. There are only 6 days left. Can L, who has never been good at outdoor activities and has lost his left and right arms, escape from the crisis? Can he eliminate the terrible death god created by humans?