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.

It's Christmas Eve in Tokyo as Ichiro is moving into his new apartment one month ahead of schedule. As he is getting settled in, two strangers enter the apartment and are surprised to find him there. They begin complaining that he is upsetting their plans for a Christmas party to be thrown in the apartment that night before attempting to kick him out.

Street racers challenge each other to exceed the current speed record held by the F1 racer. However, in order to break the record of the Megalopolis Express Freeway, you need to have "luck" in addition to a high-powered street-machine and driving technique. And you must be able to conquer the "Devil’s Curve". Racers bet their dreams and their lives against one another in a dangerous game of speed.

Ryōko Itakura returns as the tough-as-nails government taxing agent. This time she must figure out a way to expose a fanatical religious cult lead by a corrupt sociopath.

Based on the comic book series by Mio Murao.