In 1868, after the fall of the Shogun-dominated Japan, the new government orders people from Awaji, near Kobe, to re-locate to the northern part of Hokkaido. These people once supported the now displaced Samurais of the older days. After two years, over 500 of them settled in their new land under the leadership of Hideaki, husband of Shino. However, as crops fail he is to go to Sapporo to learn new techniques of farming, leaving his wife and daughter for 5 years. All this time, the new community is constantly watched by the government which choose to again uproot them from their new homes.
Strange things lurk in dreams. For Mukoda Tetsurou and the doctors tending to him, things have begun to get stranger as Mukoda begins having longer and longer dreams every night. Can one dream infinity in the span of a night?
After the events of the previous film, the 17 years-old Sukeban Deka III, Yui Kazama, works for the Juvenile Security Bureau along with her older sisters Yuka and Yuma. This organization is led by politician Kuraudo Sekin, who fights juvenile crime in heavy-handed manners, to the extent to equip his student agents with triple-bladed yo-yo weapons. However, when Sekin's methods become too zealous, Yui quits the bureau and refuses to undertake undercover missions for them. It is soon discovered that Sekin's actual goal is to overthrow the Japanese government, and the Kazama sisters, along with a gang of young outcasts, have to stop him.
