Leona Ozaki joins Newport City's infamous Tank Police division. With aid of Al and her newly built mini-tank, Bonaparte, she wages war on Buaku and his cohorts, the Puma Sisters.

Two newbies at the Narcotic Control Department in Japan, Haru and Kai, struggle against: drug dealers, gangs, murderers, psychopaths, mysterious organizations, and mad people in general. The gentle and caring one of the group, Kai, who has problems of his own, has the tendency of turning into a lethal killing machine in certain scenarios. The way he acts changes like that of a "switch". As the two do their job, answers of what is behind Kai's strange behavior and who exactly he is, is revealed.

In the follow up to Shirow's classic anime, Al, Leona and their trusty steed, Bonaparte, continue to fight crime in New Port City, alongside the rest of the Tank Police. But a new threat appears in the form of a series of terrorist attacks, using the latest weapons technology. The Tank Police are out-numbered and out-gunned, but Al and Leona set out to discover who or what is behind these attacks. With massive explosions and high-speed chases, Leona often causes more damage than the criminals she pursues.

Chirico is awoken from cold sleep and separated from Fyana. His attempts to find her come to the attention of a Nextant, the replacement for the Perfect Soldier program. At the same time, the new Pope is to be nominated, and Chirico is religiously considered to be "The Untouchable". With one of the nominees related to the Nextant, Chirico's actions will have far-reaching political ramifications. (Source: ANN)