Four years ago, Kazuma Kannagi was defeated by his cousin Ayano Kannagi for the right to be the successor of Enraiha, a sword passed down in the Kannagi family. His defeat, along with his lack of talent for En-Jutsu, the fire arts, the Kannagis' specialty, resulted in his banishment from the family. Now, Kazuma returns as Kazuma Yagami, a skilled master of Fū-Jutsu, the wind arts.

It is the near future, and the city of Freeport teeters on the verge of total collapse. The twin tides of rampant crime and ruinous graft face only one barrier: the elite strike force HARDCORPS. Led by Colonel John Blade, HARDCORPS is the last force for justice in the darkening city.