Set in a future world where huge amounts of pollution has made the earth's air unbreathable and everyone must wear a mask to avoid breathing in the toxic gases. The crime rate has risen to such an extent that a crime is being committed every 36 seconds. In response, the Mayor forms an elite fighting force know as the 'Tank Police'. When a new crime gang (Led by the cyborg, Buaku and the Cat Sisters, Anna & Uni Puma) wrecks havoc in Newport city, young Leona Ozaki is transferred to the 'Tank Police' squad. After wrecking the Squad Commander's personal armoured tank, Leona hand-makes a small Mini-tank (Nicknamed: Bonaparte) out of parts of the Squad Commander's own Tank. This new mini-Tank is a force to be reckoned with as it goes head to head with the criminals in an awesome action packed showdown.