The Kaito Protocol: They built the perfect soldier. They never counted on his ghost.

Her mind is a weapon. Her memory is the battlefield.

A woman awakens on a maglev train hurtling toward Osaka. In her hand is a gun. Across from her is a dead man. In her mind is… nothing. A perfect, terrifying void, save for a single, echoing word: Kaito. This lone clue propels her into a desperate flight for her life, a high-stakes manhunt led by a ruthlessly efficient corporate assassin who anticipates her every move. She is a ghost, a fugitive armed with deadly combat instincts she doesn't remember acquiring, and haunted by a past she cannot access.

As she plunges into the shadows of Japan's underworld, she discovers the dead man was a scientist, and the secret he carried is the key to her own shattered identity: the schematics for a neuro-scrambler, a high-tech weapon capable of erasing a person's soul. She learns her amnesia was no accident, and Kaito is not a name, but a black site where the darkest sins of corporate greed are made real. The deeper she digs, the more horrifying the conspiracy becomes, culminating in a shocking twist—she is not a victim of this technology, but its creator.

Now, the hunter chasing her is revealed to be more than just an assassin; he is the first and most perfect product of her forgotten science, a man with no past and no conscience. He is not just after the data. He is after the blueprint for the ultimate weapon, a blueprint that exists only in the architecture of her mind. To find redemption for her sins and honor the sacrifices of those who died to protect her, she must stop running and turn the hunt back on her pursuers. Her only path forward leads back to the heart of her own, terrible creation for a final, explosive confrontation where she must choose between destroying her legacy or losing herself forever.