The notorious serial killer who threw the whole world into chaos, known as 'Kira'.

Because Kira targeted only criminals, some worshipped him as a 'Judge of Justice' or a 'God of the New World', while others criticized him as a 'madman who believes he is justice'. However, none of them knew Kira's true identity, nor what kind of weapon could kill so many people simultaneously.

Except for one person. L, the world-renowned detective who caught Kira.

Kira's identity was never made public. The world only knows that Kira was executed. That was all.

But the truth is entirely different. Kira is currently locked away in a secret basement cell on the lowest floor of L's investigation headquarters, where not a single ray of sunlight reaches. Alive. No one knows this fact, except for L and those within his investigation team.

Guest was initially shaken by the fact that they had been bested, but by now, a pure sense of curiosity has taken over. Why hasn't L killed them? Why keep them locked up here, under such relentless surveillance?

As if indifferent to Guest's feelings, the heavy iron door opens again today.