In the future, in the Pacific Ocean erected Technopolis - the highest achievement in Asia and around the world. This floating ultra-modern city is the largest object ever built by mankind in order to adapt to the dramatically rapid rise in sea level.He also appears in the center of the growing confrontation between Japan and Taiwan. One day, as a result of a mysterious accident near Technopolis Taiwanese submarine disappears, and soon he goes to the bottom of Technopolis. Atsushi Kurase, head located near the underwater rig, trying to organize a rescue operation -his wife and daughter are trapped in a mini-submarine damaged. Along the way he will have to deal with the Japanese fleet, as well as to find out what kind of mysterious creature killed floating city.