In the far future, Earth is a polluted hell with massive cities and a crime problem to match. Keeping the peace is the Tank police, that literally use tanks as both their vehciles and main weapons...

In the far future, Earth is a polluted hell with massive cities and a crime problem to match. Keeping the peace is the Tank police, that literally use tanks as both their vehciles and main weapons with a nearly insane brutal dedication to their job. Leona Ozaki, an ex-motorcycle cop, joins them as the first female member, and must find a way to work with the others in her own style. It's around this time that the Tank Police uncover that a Cyborg criminal and his feline apprenti's crime spree is more than it seems.