Major Mira Killian is a secret agent in the Government’s Squad 9, who specializes in solving cases involving cyber technology and autonomous robots. She herself is an implanted human with only her brain being the original, while the “Major’s” body is completely artificial. When a series of attacks target key figures at Hanka Robotics, a leading corporation in the field of electronic implants, the culprit is identified as someone who has the ability to hack into any electronic device to take control of the system, even the human brain.

Digging deeper into the investigation, the Major gradually discovers the secrets behind his own forgotten past.