SEQUEL TO TAMER OF THE X-ANTIBODY! Three years have passed since the fall of Lucemon and the loss of the three who felled him. Shinjuku is safe. However, a single invasion act has set off a chain reaction resulting in the awakening of an ancient evil of the Digital World that threatens it and the worlds linked to it. A call to bear arms has been issued. War is on the horizon.

He said he saw great potential in my small body and he raised me. Because of him I lived, I learned, and I finally found someone I could call nakama. Even if he didn't call me the same. I am his son, I am his student...The Dragonslayer of Acnologia.