The legendary detecitve "L" takes on the "Kira" case in which countless criminals are dying under mysterious circumstances. L successfully solves the case and stops Kira, but only after sacrificing his life, leaving himself with only 23 days left to live.

For his final case L goes up agains a bio-terrorist group trying to wipe out humanity with a deadly virus ten times more fatal than Ebola. As L tries to forumlate an anitdote with a scientist, he must also save the lives of two children who have no one else to turn to. Will L be able to save the world before it's too late? Witness the last 23 days of L.