Death Note, Vol. 5 introduces the new owner of the Death Note, who uses the notebook's power to serve his own greed, while Light Yagami remains without his memory and assists L in the investigation. The task force must now hunt down this third Kira, putting Light in the ironic position of hunting his former self. This volume focuses heavily on detective work and the subtle ways Light, even without his memories, uses his natural genius to deduce the notebook's rules. As the investigation progresses, Light gets closer to recovering his memories and his identity as Kira, setting the stage for the dramatic return of his true, murderous nature and the final showdown with L.