In the present time, the meteorite-based M-34 virus is being spread at a horrific pace: infecting thousands, and mutating their bodies into alien-like creatures who destroy everyone in their path. While NOA -- an elite team of cybernetic soldiers -- work to contain the threat, a new weapon named Ai is being trained to destroy the virus once and for all. Unknown to all are her true powers -- especially once she falls in love with NOA member Yuji. Time is running out.. who will inherit the earth? The virus, or humanity?