Archaeologist Mao Mikami, possessed by the Arm of Kannon, an ancient Buddhist relic which he unearthed, is in trouble when the demon inside him awakens and begins to cause trouble.
We learn a bit about the history of the Arm of Kannon. When Kakujo was younger he learned that the arm was being maintained by living on soul-less bodies which need to be changed every few months.
I still like Ryo, the hero who has severed the arm from an infected body in the past, who needs to remove it from Mao. However, the story better start improving or I'll be really bored.
The arm cannot be destroyed because it would...unbalance the universe. Hmm.