Akiyuki was living a peaceful life along with his friends and family on Sentan Island. This peace was disrupted when sudden war broke out and a strange force took control of his body.

Transformed into Xam'd, Akiyuki confronts the enemy invasion in order to protect his friend Haru. Afterwards he is retrieved by the mysterious Nakiami and taken to the postal airship Zanbani, where she lives.

Nakiami seals herself in the Quickening Chamber and the confrontation with the Hiruken Emperor draws to a close. However, Akiyuki turns himself into stone, and nine years later, he awakens and reunite with his loved ones.