The original novel "The Empire of Corpses" was published, marking the beginning of the franchise.
The anime film adaptation of "The Empire of Corpses" was released in theaters in Japan.
Scientists discover the method of creating lifelike reanimated corpses called 'Necroware' by implanting mechanical devices into dead bodies to restore motor functions.
The protagonist's friend John Watson is transformed into a reanimated corpse through Necroware technology, which sets the protagonist's quest into motion.
Otomo Necro, the antagonist, initiates the Hydra Project aiming to develop a perfect undead being with a true soul by experimenting on corpses and incorporating advanced technology.
John Watson, the protagonist, embarks on a journey to locate the lost notebook of Frankenstein containing the secret to creating a true living corpse with a soul, aiding his mission to save his friend's soul.
Intense battles occur between military forces, reanimated corpses under various controls, and the protagonist as he seeks to retrieve the missing key and confront Otomo Necro.
It is revealed that the Tollman apparatus lacks the ability to restore a soul, challenging the morality and purpose of the reanimated corpses used in warfare.
Burke confronts Otomo Necro in the climax, using Frankenstein's notebook to restore John Watson's soul and free him from being a mere mechanical puppet.
