Light Yagami (Masataka Kubota) is an ordinary university student. One day, he receives a death note which changes his life. The death note awakens his warped sense of justice and genius. He becomes murderer Kira and punishes criminals.

L (Kento Yamazaki) is a well known private detective. L appears in front of Light Yagami. L defines Kira as evil and decides to catch Kira. Then N (Mio Yuki), who has a beautiful appearance but dangerous existence, appears.