Tsunami is an ancient guardian from days long ago when the Mother Spirit created demons and guardians to aid a fledgling human race. In 2089, only a few demons and guardians remain in the city of Neo-Shinjuku. Tsunami becomes involved with a woman who has just lost her fiance and her arm and now wants to figure out why this has happened. Meanwhile, the demon leader is still alive and plotting to enslave mankind.

Two Japanese survivors of the Khmer Rouge massacres in Cambodia vow to find a sanctuary, even if they have to build it themselves. Returning to Japan, they take seemingly opposite paths: one becomes a politician, the other a gangster. As Asami and Houjou work through the linked worlds of politics and crime in modern Japan, they don't hesitate to do anything necessary to secure their own positions and stay true to their vow. Loyal to no one else, they find their friendship increasingly tested as they rise in their chosen fields.